question about object replication theory

[yue longguang]

hi,all
take a look at the link ,
http://www.ceph.com/docs/master/architecture/#smart-daemons-enable-hyperscale
could you explain point 2, 3 in that picture.

1.
at point 2,3, before primary writes data to next osd, where is the
data? it is in momory or on disk already?

2. where is the code of point 2 or 3, at there primary distributes
data to others?

thanks
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[yue longguang]

---------- Forwarded message ----------
From: yue longguang <***@gmail.com>
Date: Tue, Sep 23, 2014 at 5:37 PM
Subject: question about object replication theory
To: ceph-***@vger.kernel.org


hi,all
take a look at the link ,
http://www.ceph.com/docs/master/architecture/#smart-daemons-enable-hyperscale
could you explain point 2, 3 in that picture.

1.
at point 2,3, before primary writes data to next osd, where is the
data? it is in momory or on disk already?

2. where is the code of point 2 or 3, at there primary distributes
data to others?

thanks
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[Sage Weil]

Post by yue longguang
---------- Forwarded message ----------
Date: Tue, Sep 23, 2014 at 5:37 PM
Subject: question about object replication theory
hi,all
take a look at the link ,
http://www.ceph.com/docs/master/architecture/#smart-daemons-enable-hyperscale
could you explain point 2, 3 in that picture.
1.
at point 2,3, before primary writes data to next osd, where is the
data? it is in momory or on disk already?

In memory

Post by yue longguang
2. where is the code of point 2 or 3, at there primary distributes
data to others?

ReplicatedPG::issue_repop()
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