Re: [zfs-discuss] SSDs get faster and less expensive

2009-07-21 Thread Henry Lau
Where is the best space to read the latest support of ZFS with SSD and its roadmap as the latest ZFS release adds SSD management to ZFS. - Henry - Original Message From: Richard Elling To: Louis-Frédéric Feuillette Cc: zfs-discuss@opensolaris.org Sent: Tuesday, July 21, 2009 5:43:23 P

[zfs-discuss] read data block

2011-06-18 Thread Henry Lau
Do anyone know how to walk back to the root if we are at the data block (level 0) in zfs? Is this possible since data block can be picked random and we don't know the parent of the indirect block at this level 0? Thanks Henry ___ zfs-discuss mailing li

Re: [zfs-discuss] Pure SSD Pool

2011-07-12 Thread Henry Lau
It is hard to say, 90% or 80%. SSD has already reserved overprovisioning places for garbage collection and wear leveling. The OS level only knows file LBA, not the physical LBA mapping to flash pages/block. Uberblock updates and COW from ZFS will use a new page/block each time. A TRIM command fr

[zfs-discuss] Download illumos build image

2011-12-20 Thread Henry Lau
Hi   When I run the following script from my illumos build 151,   ./usr/src/tools/scripts/onu -t nightly -d ./packages/i386/nightly   It also download nidia, java ... How to avoid these packages to be dowmload so that the image can be copied to the system faster?   Thanks Henry