On Fri, Apr 26, 2019 at 10:55 PM Junsong Li <junson...@fb.com> wrote:
> Hello list, > > > > I have a couple of questions on index translator implementation. > > - Why does gluster need callstub and a different worker queue (and > thread) to process those call stubs? Is it just to lower the priority of > fops of internal inodes? > > It is to make sure parallel [f]xattrops on same inode doesn't happen. Index xlator has to maintain indices in the internal directories based on whether or not the xattrs it tracks on the file are non-zero. When we allow parallel [f]xattrops, callbacks of the fops may not reach index xlator in the order they are wound to lower xlators. This can lead to index xlator not maintain indices correctly. > > - > - What’s the purpose of “link-count” in xdata? It’s being used only in > index_fstat and index_lookup. I see sometimes the key is assigned 0/1 after > callback, and sometimes AFR uses it to store flag GF_XATTROP_INDEX_COUNT. > Is the code purposely reusing the key? > > Thanks, > > Junsong > _______________________________________________ > Gluster-devel mailing list > Gluster-devel@gluster.org > https://lists.gluster.org/mailman/listinfo/gluster-devel -- Pranith
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