Boston Linux & UNIX was originally founded in 1994 as part of The Boston Computer Society. We meet on the third Wednesday of each month at the Massachusetts Institute of Technology, in Building E51.

BLU Discuss list archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss] ZFS On Linux "in" Debian, migration from Btrfs

On Fri, May 20, 2016 at 01:39:51PM -0400, Jerry Feldman wrote:
> Please share your experiences with both BTRFS and ZFS.

I use btrfs in RAID 1 and RAID 10 mode on spinning disks, RAID 1 on ssd,
zfs in RAID 10 on spinning disks with independent ZIL and L2ARC (read
and write caches) on ssd, and in RAID 1 on ssd.

btrfs is a little faster, but the only time this makes a
significant difference is in weekly scrubbing, where btrfs does
it at about twice the rate of zfs.

btrfs has a nocow option that can be set on directories or
individual files which can dramatically improve performance for
databases and VM images. But... that also turns off
checksumming, which is one of the big reasons to use zfs or
btrfs in the first place. It also turns off compression.

zfs does not have a nocow option at all. If you are running a
production database, zfs is not your friend for the database

zfs has better tools for snapshotting.

zfs is generally more flexible about turning options on and
off... except for deduplication. Do not experiment with
deduplication. zfs has many, many options.

Both support rsync-like incremental send and receive functions,
nearly instantaneous snapshotting. and compression with a couple
of algorithms. 


BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!

Boston Linux & Unix /