Archive for 'Solaris ZFS'

A great introduction to ZFS de-duplication

I’ve been looking into deploying ZFS de-duplication, and I have one application in particular (backup staging) that would greatly benefit from it. George Wilson did an awesome introduction to ZFS de-duplication video, and it’s a great place to get started. I’m planning to start testing out de-duplication as soon as my SSDs are ordered, and […]

An interesting way of looking at file system versioning (ZFS feature flags)

I got a chance to catch up with a bunch of stuff in my “need to read” / “need to watch” folder this past weekend. One of the videos I watched talked about ZFS feature flags, and how they will be used by the Illumos community to add new features to ZFS. ZFS feature flags […]

Improved ZFS scrub statistics in Solaris 10 update 9

I talked about the ZFS scrub feature a few months back. In the latest Solaris 10 update the developers added additional scrub statistics, which are quite handy for figuring out throughout and estimated completion times: $ zpool scrub rpool $ zpool status -v pool: rpool state: ONLINE scan: scrub in progress since Tue Dec 6 […]

Using the ZFS scrub feature to verify the integrity of your storage

There have been a number of articles written over the past few years that talk about how silent data corruption can occur due to faulty hardware, solar flares as well as software defects. I’ve seen some oddities in the past that would probably fall into these categories, but without sufficient time to dig deep it’s […]

Better ZFS pool fault handling coming to an opensolaris release near you!

I just saw the following ARC case fly by, and this will be a welcome addition to the ZFS file system!: OVERVIEW: Uncooperative or deceptive hardware, combined with power failures or sudden lack of access to devices, can result in zpools without redundancy being non-importable. ZFS’ copy-on-write and Merkle tree properties will sometimes allow us […]

Triple parity RAIDZ (RAIDZ3) support in ZFS

I just saw the following putback notice come over the wire: Author: Adam Leventhal Repository: /hg/onnv/onnv-gate Latest revision: 17811c723fb4f9fce50616cb740a92c8f6f97651 Total changesets: 1 Log message: 6854612 triple-parity RAID-Z This is pretty sweet, and with the introduction of 2TB+ drives, using multiple parity drives will become essential to ensuring that your data is safe when a drive […]

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