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Peter Humphrey <prh@××××××××××.uk> posted |
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200611051150.06468.prh@××××××××××.uk, excerpted below, on Sun, 05 Nov |
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2006 11:50:06 +0000: |
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> (I'd forgotten how many days would be needed for that, even on this |
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> dual-Opteron-246 box with 4 GB. KDE takes an age. Perhaps I ought to look |
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> into putting /tmp and /var/tmp onto tmpfs.) |
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Do so. It makes a /big/ difference! I don't have all of KDE merged here, |
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but trying to track down the issue I was having, but between trying to |
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track down the issue I was having (which I won't repeat here), and the |
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~arch upgrade to kde 3.5.5, and the several -rX releases of various |
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kde packages subsequent to 3.5.5, I've done a lot of kde remerging lately. |
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As best I can tell and from memory of how long it took to emerge kde |
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before I upgraded memory and put $PORTAGE_TMPDIR on tmpfs, it used to take |
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me about 14-16 hours to merge what parts of KDE I have back with a single |
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disk and a gig of memory, shortened to about 10-12 after I upgraded to a |
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4-disk RAID ($PORTDIR and $PORTAGE_TMPDIR on 4-way striped RAID-0, main |
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system on RAID-6, so two-data stripes, two parity stripes), to only a bit |
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over 8 hours, say 9, with $PORTAGE_TMPDIR on tmpfs after upgrading to 8 |
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gig memory. If you aren't running RAID, you'll get the entire benefit of |
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going from $PORTAGE_TMPDIR on the same drive as you are installing to and |
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running from to having it on tmpfs, in one shot. Note that the RAID-6 |
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main system is going to be a bit faster than a single drive, but that I |
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only have dual Opteron 242s, not the 246s you said you have. I'm guessing |
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you'll see a 2-hour minimum drop in compile times, if not 4-6, on KDE |
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alone, by putting $PORTAGE_TMPDIR on tmpfs. For an entire emerge |
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--emptytree world, you are looking probably a half-day of savings at least. |
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I am /so/ looking forward to that upgrade to dual Opteron 285s! Even |
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discounting the upgrade from dual to quad-cores, the clock-speed increase |
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alone will rock! I'm guessing perhaps 6 hours (maybe as little as 4) for |
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my KDE upgrades, and say a day (more or less) for a full system rebuild! |
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That'll be SWEET INDEED! =8^) |
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-- |
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Duncan - List replies preferred. No HTML msgs. |
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"Every nonfree program has a lord, a master -- |
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and if you use the program, he is your master." Richard Stallman |
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-- |
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