Hammer mirror-copy issue
dillon at apollo.backplane.com
Thu Jul 18 18:41:03 PDT 2013
:- Verified that the files on the backup drive were good
:- Stopped the mirror stream
:- Successfully did a pfs-upgrade on the backup drive's PFS 1
:- Formatted the primary drive and created a PFS 1 on it slaved to the
:backup drive's PFS 1
:- Started a mirror-copy from the backup drive's PFS 1 to the main drive's
:=E2=80=8Bny ideas on how the mirror-copy could have skipped some of the fil=
I don't think you needed to upgrade the backup drive's PFS 1. You
can mirror-copy a slave to a slave.
If the files are present on the backup PFS 1 they should be present on
the slave PFS 1. Hmm. Are the transaction ids the same? A slave PFS
will have a transaction id in the softlink that looks something like
mirrors -> @@0x000000030a16daa4:00001
The actual slave PFS softlink is @@-1:00001 but when you ls it HAMMER
automatically prints out the last synchronized transaction id. (For
master PFS's it always leaves it @@-1:<blah>). Every time the slave
updates from the mirror-copy or mirror-stream the softlink should
Sometimes people accidently leave themselves CD'd into the slave, then
wonder why they aren't seeing updates. You have to re-CD to get the
latest transaction id.
Othertimes people duplicate the PFS softlink but wind up writing out
a fixed transaction id instead of @@-1:<blah>.
It's possible that you accidently did the latter. Try explicitly CD'ing
into the slave PFS via @@-1:00001. If that turns out to be the problem
you can delete and recreate the PFS softlink (using -1) and it should
always read the latest transaction id again.
That's for slave PFS's. Master PFS's should always have a PFS softlink
of @@-1:<blah>. Perhaps there was a bug when you upgraded the backup
from slave to master.
In anycase, see if you can verify that both sides are synchronized to
the same transaction id. The mirror-copy program will tell you what
the source is, and you can check the target's slave PFS softlink to see
what that is.
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