[CentOS] write-intent bitmap
Markus Falb
markus.falb at fasel.atSat Aug 25 09:27:39 UTC 2012
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, On CentOS 6 I noticed very high load after installing and while the md raid 1 array was syncing. I found lots of complaints about performance degradation for md raid with enabled write-intent bitmap. See http://blog.liw.fi/posts/write-intent-bitmaps/ for example. So I wanted to it off. I let it sync and then removed the bitmap. Do you know of a way to not enable a write-intent bitmap while installing? I had a look at the Kickstart section in Upstreams Installation guide but found nothing. My only idea was a %post section stop the sync (hmm, but how, I think I have to consult mdadm(8) remove the bitmap start the sync again Maybe there is better way? Some kind of trick? I realize that I can set a bigger chunk size (but how big?) for the bitmap. But again, how do I do it while installing/kickstarting. - -- Kind Regards, Markus Falb -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlA4mosACgkQYoWFBIJE9eV5awCfSahv1b7DJ7YdHiJVI6ewjx8x De0An215k6nzYH+lk+1hsGMSzM59TnMV =580F -----END PGP SIGNATURE-----
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