Zfs list free space. root@nas ~ # zfs list nas1pool/testzvol 1.

Zfs list free space Here is a list for reference. How to find your ZFS File system storage pools. The reason being that zpool iostat actually counts the total number of bytes free in the pool ignoring redundancy. QES Overview; Real-time SnapSync Disaster Recovery; Product. ZFS can then free up the old/stale/dirty records that have newer versions and make truly free Use this command to see space used for all snapshots of a vdev - relevant property you want is usedsnap: zfs list -o name,used,avail,refer,creation,usedds,usedsnap,origin,compression,compressratio,refcompressratio,mounted,atime,lused Then, zpool list -v shows your your pool size, allocated space, and your free space. I tried various metrics that included "filesystem" in name but none of these displayed correct total disk size. 04 and now zfs list shows ~28-30GB less free space on each of my 3 zpools. For LVM-Thin you might want to use lvdisplay and vgdisplay. zfs destroy -r XX where XX will be result from above. Also, the 696G free comes from "zpool status", which shows raw free space, not taking parity and the reserved 1/64th into account. 5. Last edited: Jan 7, Doing a `zfs list -o space` or simply a `df -h` will show no empty space and also all writes will fail, but then after a reboot magically whole gigabytes of free space reappears. 25G 0B r/vmfsA 591G 870G 8. Regarding df/du - they can only show (roughly) the amount of referenced data on zfs. ZFS. We recently installed zfs and have 8 drives in a RAIDz2 config. 4G 3. Then we will sort the output with the help of the “used” property as seen below: # zfs list -t snapshot -S used. 15G legacy zroot/tmp 112K 17. 55T - - 47% 96% 1. allocated (integer, bytes) capacity (integer, bytes) <--- BTW this isn't bytes, but a %. I'm trying to free space on a ZFS by removing files. Non-redundant storage pool – When The second step required to free up space is to remove old snapshots referencing the files that were removed; list the snapshots via: zfs list -r -t snapshot -o name,used,referenced,creation I'm trying to find out how much disk space is actually free on this zfs zpool, but different commands offer different values. 3T 0 21. 6. Have the same zfs_pool metrics that FreeBSD had: zfs_pool. zfs list Example: $ zfs list NAME USED AVAIL REFER MOUNTPOINT zroot 4. If you create a FFS filesystem with a free space reservation and then go in and have root fill the filesystem, of course it gets more than 100% full, and since the free space is computed as "size - used", of course avail comes out negative if you use more than you're supposed to. Now, why did the USED column change . 02. Once you have destroyed those snapshots, you should regain about 633G of free space. Same as df -h. zpool status -v pool: pve-zfs-00 state: ONLINE scan: scrub repaired 0B in 00:00:00 with 0 errors on Sun Nov 13 00:24:01 2022 config: NAME STATE READ WRITE CKSUM pve-zfs-00 ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 ata I‘d assume the problem is this: You got 7,85TB of avail storage, zfs needs 20%free space on top, that leaves you with 6,54TB officially usable. Reply reply Top 3% Rank by size . Prior to joining the cluster I had vm 100-119, and that was in Displaying Information About ZFS Storage Pools. 49G 17. 05T free but 'zfs list poolz' ZFS Free Space. root@urbackup1:~# zfs list NAME USED AVAIL REFER MOUNTPOINT datastore 14. 8T 22. 04 (new install) from Ubuntu 14. With no arguments, the zpool listcommand displays the following information for all pools on the system: # zpool list NAME SIZE ALLOC FREE CAP HEALTH ALTROOT tank 80. The amount of free space listed by zfs list seems to keep increasing dramatically over time. #zpool list homer1 NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT homer1 7. The zpool free property is not generally useful for this purpose, and can be substantially more than the zfs available That is precisely what ZFS does. danb35 Hall of Hi all, I checked the doc Managing ZFS File Systems in Oracle® Solaris 11. When you delete a 1 GB file from /var/crash, the blocks for that file do not get removed from disk, they get "transferred" to the snapshot. Example: Type zpool list to see the size, used space, free space, and other details of all available zpools. 2 was a milestone release that brought several long-anticipated features to everyone’s favorite filesystem. Understanding Used Space. legion5% zfs list -o space NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD root 2. Open a 16d ashift=14 draid will have its reported free space cut in half regardless of the intended use case or recordsize employed. If it will not help then run scrub: zpool scrub zroot You can track the progress of operation via status command: zpool status When We have a 100G ZVOL on a FreeBSD 10. For raidz, zfs list reports space under an assumption that all blocks are or will be 128k. Each metaslab has an associated space map, which describes that metaslab's free space. *2 disk mirror *zfs list is about 30GB less free space (e. getFreeSpace, File. zfs list is the most accurate and best way to see your ZFS filesystem used and free space. Follow answered Sep 13, 2021 at 22:12. 3T 183G /mnt/ham/dmz. 25T 6. 61 Gb by a user's file system, 2 GB by /var, 1. 68G zfs_bk/me/code The zpool list and zfs list commands are better than the previous df and du commands for determining your available pool and file system space. ham 761G 13. 1M also jives with the output of zfs list. Instead, ZFS divides your zvol into (usually 200) larger areas called "metaslabs" and stores AVL-trees 1 of free block information (space map) in each metaslab. The only thing that has changed is I've been steadily copying data into the pool. If du is pulling all blocks, including parity blocks, then this starts to make sense. If a special vdev is added, metadata is stored on the special vdev. Destroy all snapshots wait some time because sometimes ZFS needs more time to reclaim free space and then check free space. 8TiB Also make sure you weren't looking at "zfs list" before and are looking at "zpool list" now. Let's assume you have a ZFS dataset zroot/var/crash that contains 4 GB of data and you snapshot the dataset. io. Shrink the size of a zvol # zfs list -t volume NAME USED AVAIL REFER MOUNTPOINT rpool/dump 5. It's the value I want; dedupratio (float ZFS referenced space is smaller than used . Out of a 100 GB pool, 32 GB is taken by the swap area, 15 GB by the dump area, 11. However, since ZFS is a COW, Copy On Write, file system, this means prior data can hang around in un-allocated space for a long time. First, we have to list the snapshots with the following command: # zfs list -t snapshot. I cannot find these snapshots. zfs list -o used,avail USED AVAIL 55. Ok I am testing v28 on a vm and just deleted about 1-2 gig of data as didnt have enough space to compile gcc, and on both 'df' and 'zfs list' the reported used space has dropped but the free space has been static. 26M 274G 0B 2. 4G 112K /tmp zroot/usr 947M 17. 5T free and lists drives as 8001. 4T - zroot/DATA/vtest referenced When i deleted the data, the space did not free up. 5T 20. both tools have absolutely no concept of anything zfs-related like compression, clones, snapshots, let Free : The amount of unallocated space in the pool. 04M 14. Example output. 19TiB/18. Hot Spare(s) can be assigned to multiple pools, and would be snagged by the pool that needs it first, if FreeBSD's ZFS implementation did so. For a filesystem with: $ zfs list -Hpo used,avail tank/r2d2 2209625051136 1605933772800 Windows shows: 1. 98 = 289. /zfs list storage NAME USED AVAIL REFER MOUNTPOINT storage 333T 1. # zpool create tank raidz2 c0t6d0 c0t7d0 c0t8d0 # zpool list tank NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT tank 408G 286K 408G 0% 1. ZFS is my favorite file system. I was poking around my zpool today and noticed something interesting [~] nick@nibbler$ sudo zfs list. g 359GB) Ubuntu 16. Last time that I I've also noticed that zfs will not free all of it's unused space unless one reboots. I don't have a solaris at hand. As written, there's plenty of free space. If you see that your snap shot is referencing your allocated space, then you can delete your The FreeNAS GUI and "df -h" / "zfs list" report this properly (~5. Proxmox VE: Installation and configuration . Why doesn’t it report the “real” used space in I'm running with auto snapshots - but go in and delete them when I have major deletions on the filesystem to truly free up the space . 00x ONLINE - [22. I have a 3x4TB raid5 array that appears as 7. 06G 10. 1 Method 1 – Use zfs list command zfs list -o space. zfs list used/free/refer up to 10% *smaller* than sendfile size for large recordsize pools/datasets (75% for draid!) #14420. Once you do the ‘zpool online ’ for the last disk (ie; you’ve replaced them all) the pool will I try to get Total and Free disk space on my Kubernetes VM so I can display % of taken space on it. 00G - rpool/swap 2. Just use zfs list -(r)t snapshot <dataset> as intended. Which one should be used to But it tells me "out of space": root@computer:~# zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT zstore02 1,81T 1,50T 320G - - 7% 82% 1. arpa]/root: geom The operating system reflects this usage as a change in the capacity of the disk. The space usage properties report actual physical space available to the storage pool. This discrepancy is due to several factors, including raidz party; zfs reservation, quota, refreservation, and refquota properties; and space set aside by spa_slop_shift (see zfs-module-parameters(5) for more information). 13T - 31% 84% 1. Is this normal behavior? I've done a ton of searching and some people say it is, some people say it isn't so I'd like to obtain a definitive answer before I put my FreeNAS box into production. 12T 1. The normal way to make a samba share report the (approximately) available space is to use a special script, configured in /usr/local/etc/smb4. By contrast, the zfs(8) available property describes how much new data can be written to ZFS filesystems/volumes. It's time to use good old method: clean up some garbage. Disks: 31K subscribers in the zfs community. zfs list -r -t snapshot delete them with. a record of what changed). 20T 1. zpool list and zfs list -r poolname show the difference: zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT tank 1,81T 360K 1,81T - - 0% 0% 1. e. You can use the zpool list command to display basic information about pools. While I'm sure that the zdb command can be used to provide information on the available space in the pool/file-system, it would require an in-depth Or will it remain the same, since ZFS can use the free space within the space reserved for volume/test? Now the second question. To lists ZFS storage pools along with a health status and space, run: # zpool list My Linux ZFS storage pool: NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP Additionally, you didn't mention how much data of which type you are actually storing, how old things at least need to be, how much free space you have right now etc. 49GB. At -b 512 I see about a 50% inflation in the size, so your 600G ZVOL would require approx. This works because ZFS will proportionally place writes to whichever vdev has most free space, in this case the brand new drives which were empty. This can be configured back to the old behaviour setting the zpool "listsnapshots" property to "on" Otherwise, you need to use the "-t snapshot" list. Let us try to understand that Internally ZFS reserves a small amount of space (slop space) to ensure some critical ZFS operations can complete even in situations with very low free space. File. 25G 0B 12K 8. 3T /mnt/storage df doesn't show free space: As you can see from your free space table going wider doesn't directly equate to more capacity, In which case, zfs list would report an estimate of 16. 7T 47% 1. 0 MB/s $ zfs list tank/foo NAME USED AVAIL REFER zfs list pool_10kw/fs. M. NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD test-zpool 9. 84T Also current builds of ZFS "hide/reserve" 1/64th or 1/32nd of your pool capacity from view so as to always have free space in case you filed the pool to 100%. 9T 696G - - 97% 1. . 76T 0 88K 0 1. If you want to see specific properties, use the -o option. 3G ZFS uses something similar to this ratio when allocating space but in order to simplify calculations and avoid multiplication overflows and other weird stuff it tracks this ratio as a fraction of 512. 9G I upgraded to Ubuntu 16. System. ZFS scrubbing option examines all data to discover silent errors due to hardware faults or In traditional file systems we use df(1) to determine free space on partitions. 5-2~bpo10+1 SPL Version If you issue a df –v on a file system whose owner is participating in shared file system, status information such as the following is displayed: Mounted on Filesystem Avail/Total Files Status /u/billyjc (OMVS. In traditional file systems we use df(1) to determine free space on partitions. Expected behavior. 00G - rpool/testvol 103M 10. Remember that ZFS supports different compression algorithms and depending on your kind of data and CPU power and stuff, it might be worth it applying the highest possible The added 20TiB will keep me running for quite some time. Jun 30, 2020 14,796 4,673 258 Germany. It's not included in the free space otherwise you could wind up with the situation where you get told you have, say, 100G free on the special vdev, and df says 100G free This is why you use thin provisioned or "sparse" zvols - when those are used in combination with VMFS6 (or VMFS5 with manual space reclamation) your change/updates/deletes in VMFS are passed down to the ZFS layer as SCSI UNMAP commands. 5TB. Teams. I work with it every day. How can I wipe free space on a ZFS volume? If you have any snapshots of the filesystem where ssn_private_file was stored, then that file is still on disk as part of those snapshots. # zfs list -t filesystem -o space NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD zroot 0 1. Improve this answer. It says that it has 9. We can also use du(1) to count the size of the files in the directory. Depending on your use case, you might want to automate the checking or set up alerts if ZFS Free Space. 3T 656G 14. certain applications, like fastfetch, don’t seem to report the “correct” values for disk space; they show the used space of the remaining free space without considering the total pool size. This is likely to be zfs destroy -r rpool/ROOT/solaris-7@1970-01-01-01:00:00 (with proper date) This is what I see now. BILLYJC) 365824/3165120 4294924769 Available ZFS, Read/Write, Device: 17,ACLS=Y, No SUID, Exported, No Security FSFULL(90,1) File System owner: AQFT The 21. 23M 0 1. 00x ONLINE /mnt However i am not seeing the extra space in the system now, is there a way from the GUI to expand the ZFS pool considering i have replaced all the drives? thanks . I understand that available space is the amount of free space remaining so total space minus used space. . Does it make a difference, if I change the setup as follows? volume now has two file systems, volume/test1 and volume/test2. Now you want to create a disk with 7100 GiB which translates to 7,62TB which is way to large for Your avail space, try with 6000 GiB which is about 6,44TB, hint: you can still resize the disk before The zpool list and zfs list commands are better than the legacy df and du commands for determining your available ZFS storage pool and file system space. Scripting ZFS Storage Pool Output. 4 TB of stuff. c), I found the last part of dsl_dataset_rollback_check() may explain this limit: * When we do the clone swap, we will temporarily use more space * due to the refreservation (the head will no longer have any * unique space, so the entire amount of the refreservation will need * to be free). zfs list -r DiskPool0. 00x ONLINE - zfs list -r tank NAME USED AVAIL REFER MOUNTPOINT tank Verify zpool has free space. But if you really want to shoot yourself in the foot, make this an alias for 'zfs list' in your users rc-file (e. As you delete data, the space maps should also shrink, but there are limitations as to how much they can shrink as all of ZFS's metadata need ZFS ZFS reported space. Greetings, I have an issue with ZFS. Sending to a new pool would be easier for that, the only difference would be the pool name and at the very end you'd just export both and import the new one w/ the old name. Edit: I've now tried with OpenIndiana's ZFS implementation with same machine and it gives 28. So this might be a bug in FreeBSD's ZFS implementation or FreeBSD HDD driver bug? Edit: I've now tried with FreeBSD-10. 04. Closed xaragon opened this issue Apr 27, 2016 · 1 comment Closed Deleting Files Doesn't Free Space #4567. Please remove some states manually to free up space. On 8-disk raidz2, 128k blocks consume 171k of raw space at ashift=9 and 180k of raw space at ashift=12, and looking at vdev_set_deflate_ratio() and vdev_raidz_asize() the ashift appears to be taken into Additionally, you didn't mention how much data of which type you are actually storing, how old things at least need to be, how much free space you have right now etc. I have a pool with ample free space: # zpool list r NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH . 6% disk space for copy-on-write. Frag : The amount of fragmentation in the pool. Have you read the manpage for zpoolprops? Quoting: The amount of free space available in the pool. 5 by the root file system, 4. Both are given a 3T reservation each (but no quotas). Archives. 8TB. 1G avail reported by zfs list doing a pacman -S with everything already downloaded and in cache, pacman reports "Net Upgrade Size: 478 Hi everyone, I've recently installed Proxmox VE 8. The zfs list command lists the usable space that is available to file systems, which is disk space minus ZFS pool redundancy metadata overhead, if any. 23M 0 0 zfs_bk/me 436K 12. 00x ONLINE - Actually with ZFS, only the ZFS pool capacity don't have this issue (that probably why zfs list don't have a capacity utilization in %). As ZFS is a copy-on-write filesystem, writing random data to the pool won't overwrite the old data until near the end of the dd process. After searching of zfs source code(dsl_dataset. So I created a new pool with a mirrored vdev and it reported 929. Take this example using a 1 GB zpool: bleonard@os200906:~# mkfile 1G /dev/dsk/disk1 bleonard@os200906:~# zpool create tank disk1 bleonard@os200906:~# zpool list tank NAME SIZE US About ZFS free space, SMB and spindown. 6TiB free, which is most likely due to rounding to 100MiB and that df doesn't fully understand ZFS's storage, so it might be off a little. 32TB With FreeBSD and ZFS, QES is flash-optimized, capable of driving outstanding performance for all-flash storage arrays. 00x ONLINE - # zfs list NAME USED AVAIL REFER MOUNTPOINT data From the zfs(8) man page, available means:. There are no snapshots either. 3T Alternatives: there are other options to free up space in the zpool, e. We have one mount point to this array, but are only getting 15T instead of 18-21T available. 7, zfs will favor faster drives for writes , but lets assume your 2 new drives are same or Suddenly my ZFS volume free space is gone, but not all space is used in each dataset. 4G 128K /usr/home ZFS has been going strong, but now is the first time I've run out of space ("only" 668GB free, and my ELK stack is telling me to free some up). None of these suggestions seem like they should help in this situation, especially considering that the value is apparently already cached, but they'd be easy to try Please feel free to join us on the new TrueNAS Community Forums. That process all went smoothly and the data was copied back onto the now larger secondary array with no problem. FreeNAS (Legacy Software Releases) FreeNAS Help & support. conf (or whatever you use) dfree command = something-you-made Use zfs list. With the legacy commands, you cannot easily discern between pool and file system space, nor do the legacy commands account for space that is consumed by descendent file systems or snapshots. Free space on pool "bpool" is 10%. Why does 'zpool list' say there is 6. Until recently, I've been confused and frustrated by the zfs list output as I try to clear up space on my hard drive. And two days ago it said 562T. Remember that ZFS supports different compression algorithms and depending on your kind of data and CPU power and stuff, it might be worth it applying the highest possible Ahh, great call @Ericloewe, I had forgotten about the free list. used Amount of storage space used within the pool. For future readers, it's this property in a pool; # zpool get freeing rpool NAME PROPERTY VALUE SOURCE rpool freeing 0 - Anytime this is non-zero, it means ZFS has not yet fully returned space from a zfs destroy operation, including removing a snapshot or clone. 16G 11. And thisis what's left after I deleted all those vm-###-disk. This will display the contents of the snapshot, including the . This space is to ensure that some critical ZFS operations can complete even in situations with very low free space remaining in the pool. 28 TB used by the root dataset /zfs_bk itself. If you remove or modify a file afterwards, the blocks that are different (meaning the blocks that are now deleted or modified) will remain on the filesystem (think of them as locked; or similar to how hard links work on Unix, as long as a reference to a file exists, it will not be If you issue a df –v on a file system whose owner is participating in shared file system, status information such as the following is displayed: Mounted on Filesystem Avail/Total Files Status /u/billyjc (OMVS. 8T 1. [q-z] /dev/sda[a-e] raidz2 /dev/sda[f-t] # zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT data 122T 1. 76T zroot/ROOT 0 15. The only way to know true capacity is to write until the space remaining gets too low for you, or until it fills up. btrfs-list handles this transparently by doing the calculations Provisioning an arch linux system in a VM: root dataset has 14. The space map is The zpool free property is not generally useful for this purpose, and can be substantially more than the zfs available space. 17T - 39% 60% 1. 302GB vs 330GB). I'm confused and don't know what to do. &quot; is the REFER column same as USED? It says that I have 2. 3. I do not see any snapshots using so much disk space. 20T 616G - 31% 66% 1. symlinks? to other files but since I deleted what I'm guessing are the links I don't know which files to delete or even if I shoudl . 2. (as of 0. 00x ONLINE - root@computer:~# zfs list NAME USED AVAIL REFER MOUNTPOINT zstore02 1,61T 148G 24K /zstore02 zstore02/dsk02 1,61T 262G 1,50T - Snapshots show how your file system looked at a specific point in the past (including its size). 3T 272K /tank The text was updated successfully, but these errors were encountered: @RubenKelevra Sure, feel free to open a PR to improve the manpages' description of the difference between the the allocated/free space listed in zpool list, and the used/available space listed in zfs list. We’re going to talk about automatically deduplicated copy operations via the new Block Reference Table feature, also known as the BRT or File Cloning. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their The first is that there is no "easy" way to know how much free space there is on a zfs pool in general. root@prox:# zfs list -t snapshot no datasets available root@prox:# root@prox:# uname -a Linux prox 4. Unfortunately, after unlinking the files, df does not show any increase in available space. Capacity : The amount of disk space used, expressed as a percentage of the total disk space. However, I am losing more than that. In particular, the origin property is useful to tell you exactly when the snapshot was created. Do you want to continue? [Y/n] Requesting to save current system state ERROR couldn't save system state: Minimum free space to take a snapshot and preserve ZFS performance is 20%. 2TiB. g. 26TiB, instead of 10. Add in ZFS overhead for redundant metadata and other info, and you get what you see. Longer version: ZFS free space ?? [SOLVED] Thread starter MEYNIER; Start date Mar 30, 2020; Forums. As you can see, according to zfs the total usable size of zpool1 is ~306TB and zpool2 is ~115tb with both pools claiming to have multiple TB's of free space. Had zfs list uses usable values, meaning after parity/redundancy. If your free space is different than you available space then you might have snap shots tying up your data. ZFS divides the space on each virtual device into a few hundred regions called metaslabs. 45TB free out of 3. The difference between the value obtained from the zfs command and the pool size value is: 1,065,151,889,408 B - 1,031,865,892,864 B = 33,285,996,544 B = 31 GiB. BILLYJC) 365824/3165120 4294924769 Available ZFS, Read/Write, Device: 17,ACLS=Y, No SUID, Exported, No Security FSFULL(90,1) File System owner: AQFT zpool list shows free space: # zpool list storage NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT storage 32. 00x ONLINE - # zfs list tank NAME USED AVAIL REFER MOUNTPOINT tank The column names correspond to the properties that are listed in Listing Information About All Storage Pools or a Specific Pool. If you write all ascii text, you'll store a lot more. For example, my pool is 18. ZFS does not include any built in method to clear free space. the ~120 GB however are still amiss from the free space shown by. But how do I free this space? /zfs_bk is completely empty # sudo zfs list -o space -r zfs_bk NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD zfs_bk 436K 5. I have compression on Again, label number rounding and other small ZFS nuances would explain this tiny difference. You’ll see no change until the last disk. I've read many Threads about how ZFS shows the used space but I'm still not sure if I set everything well OpenZFS 2. 44T 3. You can see your snapshots by using zfs list -t snap. 51 GB raw space. Is there a way to find out what is taking up all that space? And how to free that space? The pool is a stripe using just one 3 TB disk; the dataset uses lz4 compression and currently has a ratio of 1. 80T 1. 98T zfs_bk/docs 436K 1. 4G 88K none zroot/ROOT/default 3. All while `zfs -rt all` shows that no snapshots are magically removed. 7T 0% 1. Jul 20, 2021 #5 Listing them is annoying when After this operation, 0 B of additional disk space will be used. 00x ONLINE - zfs list doesn't show free space: # zfs list NAME USED AVAIL REFER MOUNTPOINT storage 21. 27T 0 2. 6-1-pve #1 SMP Wed Dec 9 10:49:55 CET 2015 x86_64 GNU/Linux $ zfs create tank/foo $ cd /tank/foo $ zfs set compression=off tank/foo $ zfs get dedup tank/foo NAME PROPERTY VALUE SOURCE tank/foo dedup off inherited from tank $ dd if=/dev/urandom of=random bs=4k ^C46253+0 records in 46253+0 records out 189452288 bytes (189 MB) copied, 62. In other words, to more accurately Hello. list them whith. fastfetch shows that I have used 1. 49T of USEDDS, zfs list -t filesystem -o name,mounted,mountpoint? It's probably not mounted, or mounted somewhere else. Jun 14, 2022 #2 That depends on your used storage. Share. Replicating the dataset with default setting makes it use 628G (also according to `zfs list`), so the data in question gets lost on the way. Of course, you know how easy it is to expand your ZFS pool: just add more disks. 70M 21. 7G for snapshots. 39 GB by /var/share. To address the intent of your question, "zpool list" does include the parity drives as used data, while "zpool status" tells you the status of your zpool, and "zfs list" tells you the used and available space for each zfs dataset. 9G /pool_10kw/fs. 3T 656G 205K /home datastore/home 14. 2-STABLE-amd64-20150917-r287929-memstick. I'll use a smaller example on my laptop, which has far less space available, but the ratios are similar for -b 512: # zfs list NAME USED AVAIL REFER We are running a server on Ubuntu 14. After updating yesterday and rebooting, sometime this For RAID5/6 setups, old versions of btrfs filesystem usage always display 0 bytes in the Free (estimated) section, and you have no way to know the free space of your filesystem. This definitely looks better, but it's really just a more optimistic estimate. 900G free space. 118 &quot;referenced Number N/A Read-only property that identifies the amount of data accessible by a dataset, which might or might not be shared with other datasets in the pool. As a cross-check, I ran this test on FreeBSD and the problem does not occur there. 3T 577G /mnt/ham. cshrc) Reactions: mer. ZFS space maps are internal data structures that describe the free and allocated space being used by ZFS. Each snapshot contains a number of properties that tell you more about the snapshot; run zfs get all tank/example@snapshot1 for example to see all of them for the snapshot1 snapshot. zfs/snapshot directory in the file system’s root. The files aren't in use and I have unmounted and remounted the pool as well. Thread starter turribeach; Start date Sep 8, 2022; Tags disk partitioning disk space partition zfs T. 38P free in zfs list. df -h says you have 3. No actual space was gained or lost in the dRAID config. I frequently see the mistaken idea popping up that ZFS allocates writes to the quickest vdev to respond. 32T 11. root@a1ubnasp01:~# zfs list -r DiskPool0 NAME USED AVAIL REFER MOUNTPOINT DiskPool0 103G 881G 24K /DiskPool0 *DiskPool0/vol01 103G 984G 12K -* root@a1ubnasp01:~# Get the current size. /root: zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT pfSense 472G 765M 471G - - 0% 0% 1. Recently the ISCSI target stops to work, quick research revealed that parent dataset for zvol runs out of space (which is odd, because zvol is thick provisoned and 600-700G was left free on dataset pool1) the zpool it reporting to have free space left, but underlaying ZFS datssets reporting no free space available. But it’s different on ZFS and this is the most confusing thing EVER. When I dols -l I can see that they're . Jim L. I know that ZFS reserves 1. Donate to FreeBSD # zfs list -t volume -o space NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD r/swapVolA 8. 9G 843G zpool status pool: t420 state: ONLINE scan: scrub repaired 0 in 1h6m with 0 errors on Mon May 23 # zfs list -t snapshot NAME USED AVAIL REFER MOUNTPOINT zroot/ROOT/default@2022-08-10-01:21:08-0 823G - 1007G - But the matter is; I didn't take any snapshot, I don't remember activating such a thing at all. 0G 22. Removing older ZFS Boot Environments that are no longer necessary will free the space and make it available again. 2 on a ZFS mirror and set some containers and some VMs. 4 P. Does anyone know why? Does java. Regarding space usage, you have three or possibly four different effects going on: Manufacturers sell drives with zpool list shows you the size of all your disks (5 * 250 GB=~1. You can use zpool iostat to see the current free and used disk space, but those numbers will be different from zfs list. Both of the scripts you linked use zfs get, but there's also zfs list -pHo which can retrieve both used and available in one invocation. Alain De Vos. Using the -b option appears to increase the space consumed by the ZVOL in inverse proportion to the blocksize specified. 46T - - 26% 96% I can assure you, datasets can be much, much larger than that in practice without difficulty. Why is there this discrepancy? Within the hypervisor cli, if I run zfs list -o space, I get the following output: zfs list will show your usable space. 10G 271G 591G 0B r/vmfsB I use ZFS extensively. In addition to these things ZFS does not and cannot know about how the free space may be used, there are some reservation features which may change somewhat from release to release, like IIRC 5% reserved space that root can write to but nobody else can--changes in system reservation policies will affect free space calculation but will not affect %USED. What do df and zfs list -o name,avail,used,refer,logicalused,logicalreferenced,usedsnap,usedds report on pool1/fs1, and what does zpool list pool1 report? (My suspicion, without seeing this data, is that the don't use 'df -h' for zfs, use 'zfs list' at that particular point in time, each dataset has that much more extra capacity, any of them can take another 5. The ashift also impacts space efficiency on raidz. The purpose of the zpool and zfs commands is to allow the administrator/user to make changes and get status information. root:~# zpool list NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT zpool1 306T 296T 9. Initially the snapshot is empty. But you don't have any extra disks available right now. 77G 301G 0B 301G 0B 42. As zfs list. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. img and that gives 28. the extra space is not allocated until used. The physical space can be different from the total amount of space that any contained datasets can actually use. 00x ONLINE - zpool2 115T 110T 4. MEYNIER Active Member. Feb 24, 2019 10 0 41 50 Sorry to disturb but Hi, any advice of how to free up space on Proxmox Backup Server manually? The backups are in separate disk, which is 100% full, so I can't do garbage collection on it because I turned off garbage collection and forget to turn it back on. zfs list is written for zfs, df -h is not, it (can) get things wrong for zfs or at least display them in a way that is confusing Then you run the ‘zpool online ’ command to tell ZFS to use all of the space on the disk. 40T 274G 3. 8M . 25G 8. getUsableSpace work on ZFS, and if so, how? The following shows the 'zpool list' reports wrong pool size / free space: CAP DEDUP HEALTH ALTROOT tank 21. 4TB * (24 - 6 drives) * 0. 3G 2. 52M 122T 0% 1. ham/dmz 183G 13. 0-CURRENT host which claims to use 176G of disk space: root@storage01:~ # zfs get all zroot/DATA/vtest NAME PROPERTY VALUE SOURCE zroot/DATA/vtest type volume - zroot/DATA/vtest creation Fri May 24 20:44 2013 - zroot/DATA/vtest used 176G - zroot/DATA/vtest available 10. You can list all ZFS datasets ("file systems") via zfs list, where the USED column indicates the space used by the dataset, which includes the files, child datasets and snapshots belonging to a specific dataset; AVAIL indicates the remaining space in the pool, and REFER System information Type Version/Name Distribution Name Debian Distribution Version buster with backports Linux Kernel 4. 4G /mnt/storage. getUsableSpace and File. Use the list option on the zfs command built into FreeBSD. Once created - root@truenas[~]# zfs list TestVPS-Pool NAME USED AVAIL REFER MOUNTPOINT TestVPS-Pool 26. What Type zfs list to view all ZFS datasets and their disk usage. 1T free space so it is a bug. 89M 2 Method 2 – Enable listing snapshot from the pool then use the same command to see more details about snapshots from the pool Short summary: When creating a single zfs disk pool consisting of only one disk with a capacity of 1TB (= 931GiB) the file system only showed 899 GiB free space (df -h or zfs list; zpool list actually showed the partition size (931 GiB) minus some overhead (resulting in 928 GiB space). 4G 4. 1. 4G 88K /usr zroot/usr/home 184K 17. from the (almost unreadable - please use code-blocks for such outputs) output of zfs list -o space you can see that the zroot/ROOT/default dataset uses 14. NAME USED AVAIL REFER MOUNTPOINT pool_10kw/fs 67. 1G 0 8. This is known as a slop space reservation. The dataset I'm interested in is tank/elk. I'm curious how the referenced space can be smaller than the used space. 13M - [root@freenas] ~# zpool list zfs-volume NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT zfs-volume 1. However on deleting the backup folder on my Primary array the space The solution is to use zfs list. turribeach. Proxmox Virtual Environment. I erroneously had mostly watched the free space reported by zfs list and was surprised when my backups stopped working. The size of a disk will appear to decrease proportionate to the snapshot usage, and this change is reflected on the dashboard Disks widget and in utilities such as df. Because space is shared within a pool, availability can be limited by any number of factors, including physical pool size, quotas, reservations, or other datasets within the pool. 58TB. The amount Let us see how to check ZFS File system storage pool on Linux, FreeBSD or Unix-like systems using the command-line option. home. Also note that the zfs list output will not reflect a bigger capacity when using 1MiB records. Which also makes sense as du seems to match approximately to what I see in zfs list. 19T in zpool list, which seems correct, but currently it says 1. 28T 0 2. With the legacy commands, you cannot easily discern between pool and file system space, nor do the legacy commands account for space that is consumed by descendant file systems or snapshots. 9G 885G 67. The amount of time depends on the size of the pool and the amount of space currently being used. They are large (>1GB) so it should show in the numbers. Listing Information About All Storage Pools or a Specific Pool. Forums. 0-13-amd64 Architecture amd64 ZFS Version zfs-0. 6T 31. Sorry for necrobumping but this was the first result on Google when I searched for "freebsd zfs storage space lost" and since it never was quite resolved I wanted to chime in. So after the delete, /var/crash has 3 GB of data and the snapshot has 1 GB of data. Example: $ zpool list. getTotalSpace all return 0 (zero). Not completely static it seems to move up and down a bit but seems to have taken no account of what I have deleted. Storage . 9M 899G 96K /mnt/TestVPS-Pool On /app (the zfs partition) File. 2 TB) including parity space. It shows for each dataset the actual size occupied by that dataset. The purpose of the zdb command is to provide an view of the inner workings of the file-system. I'm pretty sure I have plenty of free space as far my files are concerned (at least 150+ GB of free space from the available 300GB), but whatever I did is causing the system to report a full disk. 05-RELEASE][root@pfSense. To aid programmatic uses of the command, the -H option can be used to suppress the column (I'm trying to determine how much free space is left on the disk before creating any new guests) Dunuin Distinguished Member. Jim L Maybe at some point for some reason the used space was not freed after snapshot deletion. 00x ONLINE - 'zfs list' reports more correct size: $ zfs list NAME USED AVAIL REFER MOUNTPOINT tank 1. The amount of space available to the dataset and all its children, assuming that there is no other activity in the pool. The default output for the zpool list command is designed for readability and is not easy to use as part of a shell script. We will see “volsize” properties for volumes only, as we can’t see the same for datasets. increase the quota if there is space in the zpool left 2. However, the file is copied to "I don't know", as there is less space used in my zfs pool than I just copied: looks like the actual destination path you're looking for should be /rpool/data - this is the mount point specified in zfs list and the expected default path based on your setup. 00x ONLINE - NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT tank1 43. Just have a look to the column labeled "REFER" in "zfs list" output. NAME USED AVAIL REFER MOUNTPOINT. I write articles and give lectures about it. You can also see First, if I go into the hypervisor -> disks -> ZFS, it lists my pool as 5. Snapshots and used space ~ # zfs list -r -o space,refer,written -t all volume0/cbackup | head -20 NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD REFER WRITTEN Regarding deleting snapshots not increasing free space: Keep in mind that they are deltas (i. 19. With 2 parity disks, you get 3 * 250 GB = ~750 GB. I suspect you might find the same, too. The balanced AVL tree allows It appears the output of zfs list -t snapshot changed at some point, and there was a hidden snapshot consuming the extra space: There was a change where snapshots are no longer shown by default. This isn’t the case: ZFS allocates pool writes in proportion to the amount of free space available on each vdev, so that the vdevs will become full at roughly the same time regardless of how small or large each was to begin with. 38G 0 3. As a result, regardless of how much free space is in the thick volume, the allocated capacity in the storage pool will always be 100%. I have a ubuntu server with native ubuntu-zfs installed. Try Teams for free Explore Teams. root@nas ~ # zfs list nas1pool/testzvol 1. Note that 'zfs list' free space is only an estimate based on past compression rate, overhead, padding, etc. So you'll get more free space than you can actually allocate. I had just deleted about 20 GB of files but both zfs and zpool was reporting that there was still just a couple of gigs free on the pool. To see the free space in pools, you can list all pools via zpool list. Type the following command: # zpool list You will see output as follow for all pools on the system (see Table 1 below): Now information is displayed about ZFS storage pools. A send to the same pool is the same as a send to a different pool, just need to make sure you use the right options to carry all the properties and snapshots over. 8. 6 The space discrepancy between the zpool list and the zfs list output for a RAID-Z pool is because zpool list reports the inflated pool space. Hi There, I recently copied the contents of my Secondary ZFS1 Array to my Primary array temporarily so I could destroy the secondary array and recreate with an additional drive. 27T 2. Zpool list shows more free space because it doesn't account for the parity overhead of raidz2. It seems as if the removed files have hardlinks somewhere (but ls shows hardlink counters of 1 for all files unless I create a hardlink manually (which I tested)). # zfs create -V 10G tank/test_full # zfs create -s -V 10G tank/test_sparse # zfs list -o name,used,usedbydataset,usedbyrefreservation,logicalused,logicalreferenced,refreservation tank/test_sparse tank/test_full NAME USED USEDDS USEDREFRESERV LUSED LREFER Similar to how zpool is showing the raw space and zfs shows the "usable space" post-parity, I'd understood du to be effectively the latter. One day you have noticed that you don't have enough free space on your ZFS file system. 41G 17. 04 is running zfsutils-linux 0. 4G 88K none zroot/ROOT 3. Stack Exchange Network. 6042 s, 3. zfs list shows you the space available to filesystems/volumes, after all the parity is accounted for. To actually free up space you have to delete snapshots "from the bottom up". Usually I mount a zpool manually when FreeBSD booted totally with this command : # zpool import -f -R /mnt/zroot zroot but let's say that I want to mount the zroot pool as soon as possible,for sure before that,on fstab,it loads the swap space,this : Deleting Files Doesn't Free Space #4567. Doing a `zfs list -o space` or simply a `df -h` will show no empty space and also all writes will fail, but then after a reboot magically whole gigabytes of free space reappears. I know it's currently 1/32nd in ZFSonLinux, but It may still be 1/64th in FreeBSD. 84GiB/6. #zfs list -o space -r rpool show that rpool/ROOT/ubuntu_ycu6f2 uses 636GB for snapshots. 3G 8. *zpool list shows the exact same free space on both systems (e. If you zfs list a RAIDz2 of six 6TB drives, you get (USED+AVAIL) of roughly 21. Given output like this (raidz3): NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT tank 5. xTB) -- but "zpool list" reports the formatted size of all 4 drives (~11TB). 2TB, with 56% already in use. So you go and look for temporary files So the dedup worked perfectly fine, I have 100 files as described above and 'zfs list' shows me the file size which is single file size * 100 and 'zpool list' shows me the raw size on disk, There was ample free space but no new files could be added. 84T 4. However, if I click on the pool in the GUI (data/) that is listed at the very bottom of the list of CT/VM's, it shows the pool size as 3. My largest local dataset is 12T used. For ZFS a "zfs list YourPool" will show you that. The zpool list shows parity space as storage space. 00x ONLINE - # zpool status -v homer1 pool: homer1 state: ONLINE status: Some supported features are Samba seems to know how to query the disk space stats, and Windows reports reasonable disk utilization metrics. I thought that would free up the space from those VM's but it didn't. I generally don't have even a few GBs of free space because I don't need it. dtnk qvgiarv xkw oiap lvdwpnz ukn lyh tqxmyxo cdrxkv rghobw