On Thu, Nov 07, 2002 at 04:31:42PM +0100, Seth Mos wrote:
>At 10:17 7-11-2002 -0500, George Georgalis wrote:
>>I expect a single 7200rpm ide drive to be able to handle the stream.
>reading from or writing to?
>>I'm using raid for high availability; but uninterrupted streams is
>>a must. What mount parameters can I use to assure uninterrupted io?
>Is it a single file?
Have some control over that, but it may not always be one file.
>>Are there other adjustments I should be thinking of? I've seen a few
>>mentions of the Linux xfs realtime subvolume but no doc, is it ready for
>>production? From what I can tell, it's a non journeled contiguous data
>>block. Maybe I should just use ext2 for the media files? Would that be
>Read speed is about as fast on most filesystems, at least for a IDE disk.
>That is, xfs, ext2/3 and reiserfs are almost as fast reading a single large
>file. XFS is good with large files in particular.
>>higher performance? I'm not too worried about fsck, because in the case
>>of corruption I can remake the filesystem (data partition) and renew the
>>data from the node server.
>If data corruption is not a issue and you do a lot of writing to the
>filesystem, it might* be faster to use a non journaling filesystem.
>*Baring a number of caveats ofcourse. For most people this is negligble but
>not always so. It depends on too much factors.
The media files will only be written to occasionally. peak or average
read times I don't think will be an issue, _continuous_ audio/video is the
priority. I don't know specifically what the problem was with the blade
kernel but the box would not respond for several seconds at times,
apparently for journal commitment?
I imagine much of what I need will be os tuning (tips welcome) eg
minimal remote logging; but re xfs, I'm looking for mount parameters or
anything that would make disk reads as continuous as possible.
GEORGE GEORGALIS, System Admin/Architect cell: 347-451-8229
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