[zfs-discuss] ZIL performance on traditional HDDs
Hi, I was wondering is there is a performance gain for an OLTP-like workload in putting the ZFS Intent Log (ZIL) on traditional HDDs. Moreover, I'd like to have a rough idea of relative performances for an OLTP workload with the same storage (e.g. an external storage with 12 x 300GB 15Krpm HDDs) with this three configurations: 1) UFS on SVM or VxVM (HW RAID) 2) ZFS with a 12 HDDs RAIDZ1(10 + 1 + 1 spare?) 3) ZFS with 2 HDDs for ZIL and 10 HDDs RAIDZ1 (8 + 1 + 1 spare?) Thanks in advance for any advice... Rgrds, Danilo. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] ZFS Boot on SAN
Hi, are there any issue in ZFS boot using a pool with devices in a Storage Area Network (SAN)? I'm interested in both the SPARC and x86 platforms. Rgrds, Danilo. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] ZFS boot with gzip-9 compression
Hi, using VirtualBox I just tried to move an OpenSolaris 2008.05 boot environment (ZFS) on a gzip-9 compressed dataset, but I have the following error from grub: Error 16: Inconsistent filesystem structure Googling around I found the same error with ZFS boot and Xen in July 2007: http://mail.opensolaris.org/pipermail/xen-discuss/2007-July/000961.html http://bugs.opensolaris.org/bugdatabase/printableBug.do?bug_id=6584697 That was fixed.. Is mine another bug? BTW, using gzip-9 compression I got the whole OpenSolaris image in 815MB... The only issue is that it is not booting anymore ;-) Rgrds, Danilo. Danilo Poccia Senior Systems Engineer Sun Microsystems Italia S.p.A. Via G. Romagnosi, 4 Roma 00196 ITALY Phone +39 06 36708 022 Mobile +39 335 6983999 Fax +39 06 3221969 Email [EMAIL PROTECTED] Blog http://blogs.sun.com/danilop ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS boot with gzip-9 compression
Hi Victor, this seems quite easy to me but I don't know how to move around to actually implement/propose the required changes. To make grub aware of gzip (as it already is of lzjb) the steps should be: 1. create a new /onnv-gate/usr/src/grub/grub-0.95/stage2/zfs_gzip.c starting from /onnv-gate/usr/src/uts/common/fs/zfs/gzip.c and removing the gzip_compress funcion 2. add gzip_decompress at the end of /onnv-gate/usr/src/grub/grub-0.95/stage2/fsys_zfs.h 3. update the decomp_table function to link gzip and all gzip- N (with N=1...9) to the gzip_decompress function in /onnv-gate/usr/src/grub/grub-0.95/stage2/fsys_zfs.c What should I do to go on with this changes? Should I start a community project? Thanks Rgrds, Danilo. Il giorno 16/mag/08, alle ore 12:53, Victor Latushkin ha scritto: Hi, using VirtualBox I just tried to move an OpenSolaris 2008.05 boot environment (ZFS) on a gzip-9 compressed dataset, but I have the following error from grub: Error 16: Inconsistent filesystem structure Googling around I found the same error with ZFS boot and Xen in July 2007: http://mail.opensolaris.org/pipermail/xen-discuss/2007-July/000961.html http://bugs.opensolaris.org/bugdatabase/printableBug.do? bug_id=6584697 That was fixed.. Is mine another bug? This is because grub does not support booting from gzip-compressed datasets now. At this moment only LZJB algorithm is supported, please see decomp_table here: http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.95/stage2/fsys_zfs.c#65 BTW, using gzip-9 compression I got the whole OpenSolaris image in 815MB... The only issue is that it is not booting anymore ;-) Adding support for gzip may be a candidate for community project. Hth, Victor Danilo Poccia Senior Systems Engineer Sun Microsystems Italia S.p.A. Via G. Romagnosi, 4 Roma 00196 ITALY Phone +39 06 36708 022 Mobile +39 335 6983999 Fax +39 06 3221969 Email [EMAIL PROTECTED] Blog http://blogs.sun.com/danilop ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS boot with gzip-9 compression
...just noticed there is a bug on that, but it seems there no activity even if it is in state accepted: http://bugs.opensolaris.org/view_bug.do?bug_id=6538017 Should I send an email to request-sponsor AT opensolaris DOT org to propose my fix? Rgrds, Danilo. Il giorno 16/mag/08, alle ore 14:34, Danilo Poccia ha scritto: Hi Victor, this seems quite easy to me but I don't know how to move around to actually implement/propose the required changes. To make grub aware of gzip (as it already is of lzjb) the steps should be: 1. create a new /onnv-gate/usr/src/grub/grub-0.95/stage2/zfs_gzip.c starting from /onnv-gate/usr/src/uts/common/fs/zfs/gzip.c and removing the gzip_compress funcion 2. add gzip_decompress at the end of /onnv-gate/usr/src/grub/grub-0.95/stage2/fsys_zfs.h 3. update the decomp_table function to link gzip and all gzip- N (with N=1...9) to the gzip_decompress function in /onnv-gate/usr/src/grub/grub-0.95/stage2/fsys_zfs.c What should I do to go on with this changes? Should I start a community project? Thanks Rgrds, Danilo. Il giorno 16/mag/08, alle ore 12:53, Victor Latushkin ha scritto: Hi, using VirtualBox I just tried to move an OpenSolaris 2008.05 boot environment (ZFS) on a gzip-9 compressed dataset, but I have the following error from grub: Error 16: Inconsistent filesystem structure Googling around I found the same error with ZFS boot and Xen in July 2007: http://mail.opensolaris.org/pipermail/xen-discuss/2007-July/000961.html http://bugs.opensolaris.org/bugdatabase/printableBug.do?bug_id=6584697 That was fixed.. Is mine another bug? This is because grub does not support booting from gzip-compressed datasets now. At this moment only LZJB algorithm is supported, please see decomp_table here: http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.95/stage2/fsys_zfs.c#65 BTW, using gzip-9 compression I got the whole OpenSolaris image in 815MB... The only issue is that it is not booting anymore ;-) Adding support for gzip may be a candidate for community project. Hth, Victor Danilo Poccia Senior Systems Engineer Sun Microsystems Italia S.p.A. Via G. Romagnosi, 4 Roma 00196 ITALY Phone +39 06 36708 022 Mobile +39 335 6983999 Fax +39 06 3221969 Email [EMAIL PROTECTED] Blog http://blogs.sun.com/danilop Danilo Poccia Senior Systems Engineer Sun Microsystems Italia S.p.A. Via G. Romagnosi, 4 Roma 00196 ITALY Phone +39 06 36708 022 Mobile +39 335 6983999 Fax +39 06 3221969 Email [EMAIL PROTECTED] Blog http://blogs.sun.com/danilop ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
