[zfs-discuss] Re: Re: Supporting ~10K users on ZFS

2006-06-30 Thread Steve Bennett
How did you measure it? (I'm not saying it doesn't take those 45kB - just I haven't checked it myself and I wonder how you checked it). ran 'top', looked at 'mem free' created 1000 filesystems ran 'top' again. rebooted to be sure ran 'top' again I'm sure I should use something better than

[zfs-discuss] Re: Re: Supporting ~10K users on ZFS

2006-06-30 Thread Steve Bennett
Eric said: Each filesystem holding onto memory (unnecessarily if no one is using that filesystem) is something we're thinking about changing. OK - glad to hear that it's already been acknowledged as an issue! Right - NFSv4 allows client's to cross filesystem boundaries. Trond just recently

Re: [zfs-discuss] Re: Re: Supporting ~10K users on ZFS

2006-06-30 Thread Casper . Dik
yeah, thought of that, but we put some structure in ages ago to get around the possible problems with thousands of entries in one directory - so we have /export/home/NN/username where NN is a 2 digit number. I don't think there's any way to specify an automount map with multiple levels in it.

RE: [zfs-discuss] Re: Re: Supporting ~10K users on ZFS

2006-06-30 Thread Bennett, Steve
Casper said: You can have composite mounts (multiple nested mounts) but that is essentially a single automount entry so it can't be overly long, I believe. I've seen that in the man page, but I've never managed to find a use for it! What I'd *like* to be able to do is have a map that amounts

[zfs-discuss] what to put on zfs

2006-06-30 Thread Bennett, Steve
A slightly different tack now... what filesystems is it a good (or bad) idea to put on ZFS? root - NO (not yet anyway) home - YES (although the huge number of mounts still scares me a bit) /usr - possible? /var - possible? swap - no? Is there any advantage in having multiple zpools over just

Re: [zfs-discuss] what to put on zfs

2006-06-30 Thread Lori Alt
Bennett, Steve wrote: A slightly different tack now... what filesystems is it a good (or bad) idea to put on ZFS? root - NO (not yet anyway) home - YES (although the huge number of mounts still scares me a bit) /usr - possible? not yet - the system wouldn't be patchable or upgradeable. /var -

[zfs-discuss] The ZFS Read / Write roundabout

2006-06-30 Thread Nathan Kroenert
Hey all - Was playing a little with zfs today and noticed that when I was untarring a 2.5gb archive both from and onto the same spindle in my laptop, I noticed that the bytes red and written over time was seesawing between approximately 23MB/s and 0MB/s. It seemed like we read and read and read