From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: performance issue Date: Tue, 03 Nov 2015 12:34:25 +1100 Message-ID: <8737wnkgri.fsf@notabene.neil.brown.name> References: <1092031595.20151015153830@oudeis.org> <87si5bvcj4.fsf@notabene.neil.brown.name> <43246687.20151024181541@oudeis.org> <20151024213139.5b20dec6@natsu> <16514313.20151025202337@oudeis.org> <87a8r6g188.fsf@notabene.neil.brown.name> <5637E9C9.70600@oudeis.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Return-path: In-Reply-To: <5637E9C9.70600@oudeis.org> Sender: linux-raid-owner@vger.kernel.org To: Rainer =?utf-8?Q?F=C3=BCgenstein?= Cc: Linux-RAID List-Id: linux-raid.ids --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Tue, Nov 03 2015, Rainer F=C3=BCgenstein wrote: > On 25.10.2015 21:08, Neil Brown wrote: >> mdadm --grow /dev/md0 --bitmap=3Dintermnal --bitmap-chunk=3D256 > > not sure how to specify the chunks size: > > [root@alfred ~]# mdadm --grow /dev/md0 --bitmap=3Dinternal --bitmap-chunk= =3D256 > mdadm: failed to create internal bitmap - chunksize problem. > [root@alfred ~]# mdadm --grow /dev/md0 --bitmap=3Dinternal --bitmap-chunk= =3D256M > mdadm: invalid bitmap chunksize: 256M I guess you have an mdadm version earlier than 3.2 try --bitmap-chunk=3D262144 which is 256*1024. The number is in K. NeilBrown --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWOA8hAAoJEDnsnt1WYoG5chsP/jrdr7OWtv+lDHYoVnel3lAs TMKnjQjzx6NUNZnvj3T+COLSqLgmb8AIPMQl0l1Q0yezI8jo9A6VmbqHd9w/7yUL HralN1D/RI533B28lsIwPQsdPPd2XONVkNMb8ym78lZ2OPw+RdR+BOUrW6tRRQIf gEBikVS7osirbq1agGmbaoFzmnit6wp39C2ASY6FHiEkpk14XXzbyaX9rv5XcTiU gO+UVsprsB2CWvJWTPXUXr4dTPShw2dyPRdCx4XQRBJCJ5HXRk44dISw29BAng9I PC1iiWLrBCVLSQCjg8pRtEMC4/vUMUIQSNjhkrRVn4joNx0iDiqlG9HrOEXK2der TZTXwQBqN27PByoZIE3fztg67uxApw32V4IqLBeTxx1DQ2+t0zAdfOONoQSIJ/3L RmkmaOhjShZx989Tn2DT0QeJKifqWm+OhM2Psj5R8ZdB6PGEAiM7W9RNlW1sTI0e qn/VMT1/9doOj+xeb94nCGL1IEuxsGHMfBDPtgUq6TD7dW4Pg4DaV9/bTOy0PcHh LHAsEsl2XuoZu3GH8IOgLgdQWLfEiJhNJUGXaV0RwrpN74eJEr80tYL2gchVM3ee adE/03Tlv1fK0e0gp3IndkQGtxgMMGeTjauevNu6WGKkwDVDW3ArbizNI1k/LpQd auUnaOodib9f8HwWyYrF =41Cc -----END PGP SIGNATURE----- --=-=-=--