Re: [zfs-discuss] ZFS and L2ARC memory requirements?

2011-02-04 Thread Roy Sigurd Karlsbakk
> We have two 100TB boxes running as Bacula storage agents, each a > supermicro box with 40 disks (2 2,5" 500GB drives internally for the > rpool, 2 SSDs for SLOG). The remaining 35 slots are used for two L2ARC > devices (Micron, former Cruzial RealSSD C300). The drives are WD > Black, and they see

Re: [zfs-discuss] ZFS and L2ARC memory requirements?

2011-02-04 Thread Roy Sigurd Karlsbakk
> 100TB storage? Cool! What is the hardware? How many discs? Gief me ze > hardware! :oP > 100TB storage? Cool! What is the hardware? How many discs? Gief me ze > hardware! :oP We have two 100TB boxes running as Bacula storage agents, each a supermicro box with 40 disks (2 2,5" 500GB drives inte

Re: [zfs-discuss] ZFS and TRIM

2011-02-04 Thread Erik Trimble
On 2/4/2011 7:39 AM, Christopher George wrote: So, the bottom line is that Solaris 11 Express can not use TRIM and SSD? Correct. So, it might not be a good idea to use a SSD? It is true that a Flash based SSD, will be adversely impacted by ZFS not supporting TRIM, especially for the ZIL accel

Re: [zfs-discuss] ZFS and TRIM

2011-02-04 Thread David Magda
On Fri, February 4, 2011 09:30, Pawel Jakub Dawidek wrote: > But in most cases we don't need TRIM to be so perfect. My > current idea is to delay TRIM operation for some number of transaction > groups. For example if block is freed in txg=5, I'll send TRIM for it > after txg=15 (if it wasn't reass

Re: [zfs-discuss] ZFS and TRIM

2011-02-04 Thread Christopher George
> So, the bottom line is that Solaris 11 Express can not use > TRIM and SSD? Correct. > So, it might not be a good idea to use a SSD? It is true that a Flash based SSD, will be adversely impacted by ZFS not supporting TRIM, especially for the ZIL accelerator. But a DRAM based SSD is immune t

Re: [zfs-discuss] ZFS and TRIM

2011-02-04 Thread Pawel Jakub Dawidek
On Sat, Jan 29, 2011 at 11:31:59AM -0500, Edward Ned Harvey wrote: > What is the status of ZFS support for TRIM? [...] I've no idea, but because I wanted to add such support for FreeBSD/ZFS for a while now, I'll share my thoughts. The problem is where to put those operations. ZFS internally have

Re: [zfs-discuss] ZFS and TRIM

2011-02-04 Thread Deano
Even without TRIM and lots of use, SSD are still likely to help as ZIL and L2ARC cache units better than spindle disks, however don't expect the same performance you got after a fresh wipe/install. It makes sense to go with the brands with the best garbage collector you can and also if you can lea

Re: [zfs-discuss] ZFS and L2ARC memory requirements?

2011-02-04 Thread Orvar Korvar
100TB storage? Cool! What is the hardware? How many discs? Gief me ze hardware! :oP -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

Re: [zfs-discuss] ZFS and TRIM

2011-02-04 Thread Orvar Korvar
So, the bottom line is that Solaris 11 Express can not use TRIM and SSD? Is that the conclusion? So, it might not be a good idea to use a SSD? -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://ma