Re: [HEADSUP] ZFS version 15 committed to head
On Tue, Jul 13, 2010 at 04:02:42PM +0200, you (Martin Matuska) sent the following to the -current list: Dear community, Feel free to test everything and don't forget to report any bugs found. When I create a raidz pool of 3 equally sized hdd's (3x2Tb WD caviar green drives) the reported available space by zpool and zfs is VERY different (not just the known differences). On a 9.0-CURRENT amd64 box: # uname -a FreeBSD trinity.lordsith.net 9.0-CURRENT FreeBSD 9.0-CURRENT #1: Tue Jul 13 21:58:14 UTC 2010 r...@trinity.lordsith.net:/usr/obj/usr/src/sys/trinity amd64 # zpool create pool1 raidz ada2 ada3 ada4 # zpool list pool1 NAMESIZE USED AVAILCAP HEALTH ALTROOT pool1 5.44T 147K 5.44T 0% ONLINE - # ada drives dmesg output: ada2 at ahcich4 bus 0 scbus5 target 0 lun 0 ada2: WDC WD20EARS-00MVWB0 50.0AB50 ATA-8 SATA 2.x device ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) ada2: Command Queueing enabled ada2: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) ada3 at ahcich5 bus 0 scbus6 target 0 lun 0 ada3: WDC WD20EARS-00MVWB0 50.0AB50 ATA-8 SATA 2.x device ada3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) ada3: Command Queueing enabled ada3: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) ada4 at ahcich6 bus 0 scbus7 target 0 lun 0 ada4: WDC WD20EADS-11R6B1 80.00A80 ATA-8 SATA 2.x device ada4: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) ada4: Command Queueing enabled ada4: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C) zfs list however only shows: # zfs list pool1 NAMEUSED AVAIL REFER MOUNTPOINT pool1 91.9K 3.56T 28.0K /pool1 I just lost the space of an entire hdd! To rule out a possible drive issue I created a raidz pool based on 3 65m files. # dd if=/dev/zero of=/file1 bs=1m count=65 # dd if=/dev/zero of=/file2 bs=1m count=65 # dd if=/dev/zero of=/file3 bs=1m count=65 # zpool create test raidz /file1 /file2 /file3 # # zpool list test NAME SIZE USED AVAILCAP HEALTH ALTROOT test 181M 147K 181M 0% ONLINE - # zfs list test NAME USED AVAIL REFER MOUNTPOINT test 91.9K 88.5M 28.0K /test When I create a non-redundant storage pool using the same 3 files or 3 drives the available space reported by zfs is what I'm expecting to see though so it looks like creating a raidz storage pool is showing very weird behavior. This doesn't have as much to do with the ZFS v15 bits commited to -HEAD since I have the exact same behavior on a 8.0-RELEASE-p2 i386 box with ZFS v14. A friend of mine is running osol build 117 but he created his raidz pool on an even older build though. His raidz pool also uses 3 equally-sized drives (3x2Tb) and his raidz pool is showing: % zfs list -r pool2 NAMEUSED AVAIL REFER MOUNTPOINT pool2 3.32T 2.06T 3.18T /export/pool2 % df -h pool2 Filesystem size used avail capacity Mounted on pool2 5.4T 3.2T 2.1T61%/export/pool2 To run further tests he also created a test raidz pool using 3 65m files: % zfs list test2 NAMEUSED AVAIL REFER MOUNTPOINT test2 73.5K 149M21K /test2 So on osol build 117 the available space is what I'm expecting to see whereas on FreeBSD 9.0-CURRENT amd64 and 8.0-RELEASE-p2 i386 Is someone having the same issues? Cheers, marco pgpQwcquU4UgC.pgp Description: PGP signature
Re: [HEADSUP] ZFS version 15 committed to head
On Sat, Jul 17, 2010 at 12:25:56PM +0200, you (Stefan Bethke) sent the following to the -current list: Am 17.07.2010 um 12:14 schrieb Marco van Lienen: # zpool list pool1 NAMESIZE USED AVAILCAP HEALTH ALTROOT pool1 5.44T 147K 5.44T 0% ONLINE - ... zfs list however only shows: # zfs list pool1 NAMEUSED AVAIL REFER MOUNTPOINT pool1 91.9K 3.56T 28.0K /pool1 I just lost the space of an entire hdd! zpool always shows the raw capacity (without redundancy), zfs the actual available capacity. I have read many things about those differences, but why then does zfs on opensolaris report more available space whereas FreeBSD does not? That would imply that my friend running osol build 117 couldn't fill up his raidz pool past the 3.56T. marco pgpQK6Bhz2NSv.pgp Description: PGP signature
Re: RAIDZ capacity (was ZFS version 15 committed to head)
On Sat, Jul 17, 2010 at 01:04:52PM +0200, you (Stefan Bethke) sent the following to the -current list: I have read many things about those differences, but why then does zfs on opensolaris report more available space whereas FreeBSD does not? That would imply that my friend running osol build 117 couldn't fill up his raidz pool past the 3.56T. You didn't show us how your friends pool is set up. With RAIDZ1, the capacity of one of the devices in the pool is used for redundancy, with RAIDZ2 it's two disks worth. So three 2TB disks with RAIDZ1 gives you 4TB net capacity. If you don't care about redundancy, use a simple concatenation, i. e. don't specify mirror, raidz or raidz2 when creating the pool. My friend created his raidz pool just the same way as I did: zpool create pool2 raidz c0d0 c0d1 c0d2 So just 3 dedicated drives. I also posted the example of creating a test raidz pool based on 3 65Mb files. On osol there is more available space being reported by 'zfs list' on that test raidz pool When I created a similar test raidz pool also based on 3 65Mb files, 'zfs list' on my FreeBSD boxes (9.0-CURRENT amd64 and 8.0-RELEASE-p2 i386) is showing much less available space. So regardless whether we use whole disks or simply files for testing purposes, 'zfs list' on the osol system is reporting more available space. cheers, marco pgpvoeRVwVWU8.pgp Description: PGP signature
Re: [HEADSUP] ZFS version 15 committed to head
On Sat, Jul 17, 2010 at 10:12:10AM -0700, you (Freddie Cash) sent the following to the -current list: I have read many things about those differences, but why then does zfs on opensolaris report more available space whereas FreeBSD does not? That would imply that my friend running osol build 117 couldn't fill up his raidz pool past the 3.56T. You used different commands to check the disk space on OSol (zpool vs df). Try the same commands on both FreeBSD and OSol (zpool and zfs) and you'll see the same results. I guess you missed my original mail of this thread in which I also showed the output of 'zfs list -r pool2' on osol where clearly there is more available space shown then on FreeBSD. % zfs list -r pool2 NAMEUSED AVAIL REFER MOUNTPOINT pool2 3.32T 2.06T 3.18T /export/pool2 df works differently on OSol than it does on FreeBSD, you can't compare them. HTH ___ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to freebsd-current-unsubscr...@freebsd.org
