Linux Archive

Linux Archive (http://www.linux-archive.org/)
-   CentOS (http://www.linux-archive.org/centos/)
-   -   write-intent bitmap (http://www.linux-archive.org/centos/697567-write-intent-bitmap.html)

Markus Falb 08-25-2012 09:27 AM

write-intent bitmap
 
-----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/

iEYEARECAAYFAlA4mosACgkQYoWFBIJE9eV5awCfSahv1b7DJ7 YdHiJVI6ewjx8x
De0An215k6nzYH+lk+1hsGMSzM59TnMV
=580F
-----END PGP SIGNATURE-----

_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos


All times are GMT. The time now is 03:25 PM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.