[657] in SIPB-AFS-requests
inconsistency in the sipb cell
daemon@ATHENA.MIT.EDU (Marc Horowitz)
Mon Apr 6 18:36:49 1992
To: sipb-afsreq@MIT.EDU
Cc: bug-afs@MIT.EDU
Reply-To: Marc Horowitz <marc@MIT.EDU>
Date: Mon, 06 Apr 92 18:35:44 EDT
From: Marc Horowitz <marc@MIT.EDU>
In doing the backup, we noticed that there were a few problems with
volumes in the sipb cell. The symptoms looked like this:
<12> deathtongue:~> vos ex user.yandros -c sipb
user.yandros 536872619 RW 6682 K On-line
ROSEBUD.MIT.EDU /vicepa
Parent 536872619 Clone 0 Backup 536872621
MaxQuota 7500 K
Creation Sun Jan 5 23:33:03 1992
Last Update Mon Apr 6 17:29:50 1992
8430 accesses in the past day
readWriteID 536872619 valid
readOnlyID 536872620 invalid
backUpID 536872621 valid
number of sites -> 1
server ROSEBUD.MIT.EDU partition /vicepa RW Site
but:
<13> deathtongue:~> vos ex user.yandros.backup -c sipb
Could not fetch the information about volume 536872621 from the server
: No such device
Volume does not exist on the site indicated by the VLDB
user.yandros
readWriteID 536872619 valid
readOnlyID 536872620 invalid
backUpID 536872621 valid
number of sites -> 1
server ROSEBUD.MIT.EDU partition /vicepa RW Site
Exit 1
Sure enough, the volume wasn't there. I'm willing to believe things
can get out of sync, but there were two other bugs, which I believe
should be fixed:
<11> deathtongue:~> vos backup user.yandros -c sipb -verbose
Created backup volume for user.yandros
Note complete lack of any error. But, compare with a working backup:
<10> deathtongue:~> vos backup user.marc -c sipb -verbose
Re-cloning backup volume 536872364 ...done
Created backup volume for user.marc
That's different, but I wouldn't notice them unless I happened to be
looking for a problem. Running "vos syncvldb" did *not* notice that
the volume was missing from the disk, and did *not* remove it from the
vldb. This is a bug.
To fix things, I had to explicitly remove the volume:
<15> deathtongue:~> vos remove rosebud a user.yandros.backup -c sipb -verbose
user.yandros
readWriteID 536872619 valid
readOnlyID 536872620 invalid
backUpID 536872621 valid
number of sites -> 1
server ROSEBUD.MIT.EDU partition /vicepa RW Site
WARNING: Volume 536872621 did not exist on the disk
Marking the backup volume 536872621 deleted in the VLDB
Volume 536872621 on partition /vicepa server rosebud deleted
Note the WARNING. Now, vos backup dtrt:
<16> deathtongue:~> vos backup user.yandros -c sipb -verbose
Creating a new backup clone 536872621 ...done
Created backup volume for user.yandros
Marc
