On Wed, 20 May 2015 11:20:32 +0800 Guoqing Jiang <gqjiang@xxxxxxxx> wrote: > V3 changes: > 1. re-orgnize some codes to ensure mdadm compiles after each patch is applied > 2. change the code for super1.c for first patch since it has side effect for > non-cluster condition > > V2 changes: > 1. re-arrange the squence of patches > 2. add some memembers into sb_le_to_cpu > 3. handle some logic change and comments from Neil > > Basic background for Cluster MD: Cluster MD is a shared-device RAID for a > cluster, currently, the implementation is limited to RAID1 but with further > work (and some positive feedback), it could be extend to other RAID levels. > > The kernel part code of cluster-md has been sent to maillist several month > ago by Goldywyn, and to make cluster-md works, the mdadm tools also need to > do some changes accordingly. > > This patch set extends mdadm tool to aware cluster MD scenario, and handle > related cluster-md scenario. > > 1. the first part (0001-0007) comes from Goldwyn, which add initial > support for cluster-md, those changes included make mdadm awares nodes, > home-cluster and n bitmaps for clustered mode, also let mdadm can > confirm disk which is added by another node. > > > 2. the second part is for support change cluster-name and node nums under > assemble mode. Which extend write-bitmap to handle above cases, and also > use the extended write_bitmap for update uuid. [PATCH V2 10/10] is just compiled > test only. > > BTW: this series is based on commit "72a457 IMSM: Count arrays per orom". > > Some reltated links: > [1] http://marc.info/?l=linux-raid&m=141891941330336&w=2 > [2] http://marc.info/?l=linux-raid&m=141935561418770&w=2 > > Guoqing Jiang (11): > Create n bitmaps for clustered mode > Add nodes option while creating md > home-cluster while creating an array > Show all bitmaps while examining bitmap > Add a new clustered disk > Convert a bitmap=none device to clustered > Skip clustered devices in incremental > mdadm: add the ability to change cluster name > mdadm: change the num of cluster node > Reuse calc_bitmap_size to reduce code size > Reuse the write_bitmap for update uuid > > Assemble.c | 14 ++++-- > Create.c | 5 +- > Grow.c | 22 +++++++-- > Incremental.c | 5 ++ > Makefile | 1 + > Manage.c | 33 +++++++++++-- > ReadMe.c | 3 ++ > bitmap.c | 94 ++++++++++++++++++++++--------------- > bitmap.h | 7 ++- > config.c | 27 ++++++++++- > md_p.h | 7 +++ > md_u.h | 1 + > mdadm.8.in | 28 +++++++++++- > mdadm.c | 69 +++++++++++++++++++++++++++- > mdadm.h | 20 +++++++- > super0.c | 4 +- > super1.c | 145 +++++++++++++++++++++++++++++++++++++++++++++++----------- > util.c | 60 ++++++++++++++++++++++++ > 18 files changed, 458 insertions(+), 87 deletions(-) > Thanks. This looked like it is getting close. Most of the things I have commented on a fairly minor and should be easy to fix. Hopefully the next time you post I have just add all the patched to my git tree and we can take incremental patches from there. I hope to make a 3.3.3 release of mdadm soonish, and then I'll target 3.4 to primarily just add the clustering stuff. If I get the next patchset before I've released 3.3.3, I'll just put it in a separate branch and merge it later. Thanks, NeilBrown
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