Hello, We just purchased two of the sc847e26-rjbod1 units to be used in a storage environment running Solaris 11 express.
We are using Hitachi HUA723020ALA640 6 gb/s drives with an LSI SAS 9200-8e hba. We are not using failover/redundancy. Meaning that one port of the hba goes to the primary front backplane interface, and the other goes to the primary rear backplane interface. For testing, we have done the following: Installed 12 disks in the front, 0 in the back. Created a stripe of different numbers of disks. After each test, I destroy the underlying storage volume and create a new one. As you can see by the results, adding more disks, makes no difference to the performance. This should make a large difference from 4 disks to 8 disks, however no difference is shown. Any help would be greatly appreciated! This is the result: root@cm-srfe03:/home/gdurham~# zpool destroy fooPool0 root@cm-srfe03:/home/gdurham~# sh createPool.sh 4 spares are: c0t5000CCA223C00A25d0 spares are: c0t5000CCA223C00B2Fd0 spares are: c0t5000CCA223C00BA6d0 spares are: c0t5000CCA223C00BB7d0 root@cm-srfe03:/home/gdurham~# time dd if=/dev/zero of=/fooPool0/86gb.tst bs=4096 count=20971520 ^C3503681+0 records in 3503681+0 records out 14351077376 bytes (14 GB) copied, 39.3747 s, 364 MB/s real 0m39.396s user 0m1.791s sys 0m36.029s root@cm-srfe03:/home/gdurham~# root@cm-srfe03:/home/gdurham~# zpool destroy fooPool0 root@cm-srfe03:/home/gdurham~# sh createPool.sh 6 spares are: c0t5000CCA223C00A25d0 spares are: c0t5000CCA223C00B2Fd0 spares are: c0t5000CCA223C00BA6d0 spares are: c0t5000CCA223C00BB7d0 spares are: c0t5000CCA223C02C22d0 spares are: c0t5000CCA223C009B9d0 root@cm-srfe03:/home/gdurham~# time dd if=/dev/zero of=/fooPool0/86gb.tst bs=4096 count=20971520 ^C2298711+0 records in 2298711+0 records out 9415520256 bytes (9.4 GB) copied, 25.813 s, 365 MB/s real 0m25.817s user 0m1.171s sys 0m23.544s root@cm-srfe03:/home/gdurham~# zpool destroy fooPool0 root@cm-srfe03:/home/gdurham~# sh createPool.sh 8 spares are: c0t5000CCA223C00A25d0 spares are: c0t5000CCA223C00B2Fd0 spares are: c0t5000CCA223C00BA6d0 spares are: c0t5000CCA223C00BB7d0 spares are: c0t5000CCA223C02C22d0 spares are: c0t5000CCA223C009B9d0 spares are: c0t5000CCA223C012B5d0 spares are: c0t5000CCA223C029AFd0 root@cm-srfe03:/home/gdurham~# time dd if=/dev/zero of=/fooPool0/86gb.tst bs=4096 count=20971520 ^C6272342+0 records in 6272342+0 records out 25691512832 bytes (26 GB) copied, 70.4122 s, 365 MB/s real 1m10.433s user 0m3.187s sys 1m4.426s _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
