[DRBD-announce] drbd-8.3.11rc1.tar.gz

Philipp Reisner philipp.reisner at linbit.com
Mon May 23 18:49:31 CEST 2011


This is a bugfix only release in of the 8.3 code branch.

The most subtlety bug fixed with this release is in the
area of the max_bio_size negotiation:
  Over the course of the last releases we where driving up
  the max_bio_size supported by DRBD. We had an optimistic
  negotiation of the agreed max_bio_size in place.
  Now, if one created a device, made it primary, connected
  it to a peer node with data, and attached the local disk
  after all that, he could cause DRBD to shrink the
  max_bio_size with that attach operation.
  But shrinking the max_bio_size is a problem if a BIO gets
  created with the old (larger) max_bio_size and gets 
  submitted when the new (smaller) max_bio_size is set.

The other fixes are quite on the same page:
  Rather not so common cases.

Interesting for long distance replication users, is the bugfix
for establishing connections.

Please note: This is a release candidate, not intended for production.
Please help with testing!

8.3.11rc1 (api:88/proto:86-96)
 * Fixed handling of read errors during online verify runs
 * Fixes for possible distributed deadlocks during online verify and
   checksum based resync processes
 * Fixed handling of IO errors with an on-io-error=pass-on policy; the
   disk state goes to inconsistent
 * Fixed the behaviour in case ping-timeout and ping-int are set to the
   same value
 * Fix for connecting on high latency network links
 * Fixed state transitions if fence-peer handler returns after connection was
   established again
 * Made the max_bio_size negotiation conservative instead of optimistic
 * Network timeouts for mirrored write requests are now always enforced,
   no longer only when the socket is congested


: Dipl-Ing Philipp Reisner
: LINBIT | Your Way to High Availability
: Tel: +43-1-8178292-50, Fax: +43-1-8178292-82
: http://www.linbit.com

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