Re: [zfs-discuss] ZFS + DB + default blocksize

2007-11-14 Thread Jesus Cea
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Louwtjie Burger wrote: On 11/8/07, Richard Elling [EMAIL PROTECTED] wrote: Potentially, depending on the write part of the workload, the system may read 128 kBytes to get a 16 kByte block. This is not efficient and may be noticeable as a

Re: [zfs-discuss] ZFS + DB + default blocksize

2007-11-12 Thread Roch - PAE
Louwtjie Burger writes: Hi What is the impact of not aligning the DB blocksize (16K) with ZFS, especially when it comes to random reads on single HW RAID LUN. How would one go about measuring the impact (if any) on the workload? The DB will have a bigger in memory footprint as

Re: [zfs-discuss] ZFS + DB + default blocksize

2007-11-12 Thread Anton B. Rang
Yes. Blocks are compressed individually, so a smaller block size will (on average) lead to less compression. (Assuming that your data is compressible at all, that is.) This message posted from opensolaris.org ___ zfs-discuss mailing list