Zfs Dnodesize Legacy. 84T - ringo logicalreferenced 42. ZFS FileSystem > ZFS ZFS is a
84T - ringo logicalreferenced 42. ZFS FileSystem > ZFS ZFS is a combined file system and logical volume manager designed by Sun Microsystems (now owned by Oracle), which is licensed as open-source software under ZFS has many different configurable properties for pools, for vdevs and for datasets. Switching from legacy to EFI boot generally requires reinstalling, or at least repartitioning (which you can't really do). The dnodesize=auto causes the storm of transactions on receiving side slowing it to the crawl. 4 GiB of The Issue The performance of zfs send drops significantly when using Raidz layouts comparatively to the pool read/write performance. I’m sure you know this, but it should be mentioned so others can more easily ahrens commented on Jan 4, 2021 @pcd1193182 Could you take a look at this? note: dnodesize=auto is the same as dnodesize=1k, i. Yeah, this is pretty much duplicate of #11353 . 1. Leave dnodesize set to legacy if you need to receive a send stream of this dataset on a pool that doesn’t enable the large_dnode feature, or if you need to import this pool on a I've been tinkering with a tool to monitor ZFS usage and statistics for the last few weeks. What is the recommendation for datasets of /home/user/? It seems zfs set dnodesize=legacy rpool is what is needed. 2 2. e. 2 slots. 0 Architecture amd64 OpenZFS Version zfs-2. Many of those can be changed at any point, but some can only be set at creation ZFSPROPS (7) Miscellaneous Information Manual ZFSPROPS (7) NAME zfsprops -- native and user-defined properties of ZFS datasets DESCRIPTION Properties are divided into two types, ZFS read speed low, write speed high; unable to repro I am running truenas core 12. These properties apparently make a significant performance difference for Samba shares and are widely recommended for ZoL, but were not made the default (even on ZoL How about removing half of the raid1/mirror (let's say hd1-gpt2), create a new ZFS pool (on hd1-gpt2, let's say newpool) without dnodesize=auto, create new ROOT and The current implementation preserves the full Solaris znode. 1 Checks 2. If a file system's mount point is set to legacy ZFS makes no attempt to manage the file . The time it takes is proportional to the number of files, which is also the case for legacy. There is currently no requirement for dynamic dnode size within a single filesystem. You need to rewrite all ZFS disk blocks without dnodesize=auto, which I believe is impossible. It's encouraged me to learn a lot more about ZFS as I figure out what it's telling me. Check if root is on ZFS 2. System information Describe the problem you're observing I use beegfs and the metadata part is stored in extended attributes, so I also had xattr=sa since the beginning. A zfs send/recv won't change the record-size (unless > 128k w/o the -L option) , so you'll get the same effective record sizes as you had on the sending side on the receive side. This znode however has several fields which are redundant with a Linux inode (atime, size, uid, gid, mode, gen). 2-1 Hey, I'm looking for help to make good use of the hardware I have on my media server, which stores lots of large files: primarily 4k video, but also lots of VM backup and OS ZFS must be able to work on a filesystem with large dnodes, even if it cannot initially access the extra dnode space 'zfs' tool must be able to specify dnode size for a filesystem at creation time I want to use zfs on my laptop with the focus on snapshots that gets send to a long term storage (no raid/redundancy). 00x - ringo written 192K - ringo logicalused 1. 01x - System information Type Version/Name Distribution Name Debian Distribution Version bookworm Kernel Version 5. It takes about 25 times longer with auto compared to legacy with in-memory pool. with 2 datasets created, to measure speed of write/read when the recordsize is switched from 128k to This is not unique to ZFS. GRUB does not and will not work on 4Kn with legacy (BIOS) booting. After The second pool (and the most important for my issue) is the ZFS pool destined to my VMs storage: it consinsts in x6 Samsung 870 QVO 2Tb SSDs with RAIDZ1 redundancy, it's called This feature becomes active once a dataset contains an object with a dnode larger than 512 B, which occurs as a result of setting the dnodesize dataset property to a value other than legacy. 00x - data written 433G - data logicalused 433G - data logicalreferenced 433G - data volmode default default zfs10-pool/subvol-103-disk-0 dnodesize legacy default zfs10-pool/subvol-103-disk-0 refcompressratio 1. ZFS must be able to work on a filesystem with large dnodes, even if it cannot initially access the extra Leave dnodesize set to legacy if you need to receive a send stream of this dataset on a pool that doesn't enable the large_dnode feature, or if you need to import this pool on a system that Since the MDT zpool is an NVMe mirrored setup, should I be concerned about the extra potential IO if I set dnodesize=legacy and just deal with spill blocks so I can get snapshots to be In the context of ZFS as root filesystem this means that you can use all optional features on your root pool instead of the subset which is also present in the ZFS 1 Introduction 1. 15. Therefore you need to create a fresh new rpool and copy everything there. 2 Solution Overview 2 Switching to proxmox-boot-tool from a Running Proxmox VE System 2. To highlight the problem I use zfs If needed, ZFS file systems can also be managed with traditional tools Po mountumount /etc/fstab Pc . Computers that have less than 2 GiB of memory run ZFS slowly. 53% of the files have dnodesize=legacy still, not sure why - maybe an internal lustre MDT osd llog or related file, but clearly the majority of the files are set to 1K, matching the current ringo dnodesize legacy default ringo refcompressratio 1. 4 GiB of data dnodesize legacy default data refcompressratio 1. So yes, you can and probably should do that, and According to the man page, the dnodesize != legacy is a permanent taint on the dataset, and until the offending dataset is destroyed, the pool remains poisoned and the machine won't boot. 5K - ringo filesystem_limit none default The solution I ran zfs get -r dnodesize rpool to get a sense of what were the different dnodesize values for all the datasets in the pool. They were all set to legacy, except for my rpool/nas This not unique to ZFS. 1 Problem Description 1. I have to set dnodesize=legacy, so ~2. 1 1.
