On Dec 7, 2010, at 9:49 PM, Edward Ned Harvey <opensolarisisdeadlongliveopensola...@nedharvey.com> wrote:
>> From: Ross Walker [mailto:rswwal...@gmail.com] >> >> Well besides databases there are VM datastores, busy email servers, busy >> ldap servers, busy web servers, and I'm sure the list goes on and on. >> >> I'm sure it is much harder to list servers that are truly sequential in IO > then >> random. This is especially true when you have thousands of users hitting > it. > > Depends on the purpose of your server. For example, I have a ZFS server > whose sole purpose is to receive a backup data stream from another machine, > and then write it to tape. This is a highly sequential operation, and I use > raidz. > > Some people have video streaming servers. And http/ftp servers with large > files. And a fileserver which is the destination for laptop whole-disk > backups. And a repository that stores iso files and rpm's used for OS > installs on other machines. And data capture from lab equipment. And > packet sniffer / compliance email/data logger. > > and I'm sure the list goes on and on. ;-) Ok, single stream backup servers are one type, but as soon as you have multiple streams, even for large files, then IOPS trumps throughput to a degree, of course if throughput is very bad then that's no good either. Know your workload is key, or have enough $$ to implement RAID10 everywhere. -Ross _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
