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Recommended update for multipath-tools

Knowledgebase

(Last modified: 05DEC2005)


solutions Recommended update for multipath-tools SuSE Linux Maintenance Web (35ad18e615b6b56f08e115094e1c1c02)

Applies to

Package: multipath-tools
Product(s): SUSE CORE 9 for x86
SUSE CORE 9 for Itanium Processor Family
SUSE CORE 9 for IBM POWER
SUSE CORE 9 for IBM S/390 31bit
SUSE CORE 9 for IBM zSeries 64bit
SUSE CORE 9 for AMD64 and Intel EM64T
Open Enterprise Server
Novell Linux Desktop 9 for x86
Novell Linux Desktop 9 for x86_64
Patch: patch-10641
Release: 20051205
Obsoletes: none

Indications

All users of multipath-tools should update.

Contraindications

None.

Problem description

This update provides consolidates new features and bugfixes:
  • proactive path group re-enable, as soon as one path goes up
  • a Command Line Interface to drive and inspect the daemon
  • remove the multipath(8) cache file logic in favour of a multipathd<->multipath unix socket request/reply design
  • split multipath(8) listing option into
    • short-list (-l): don't fetch wwid, path checker status, priorities, which is fast
    • detailed-list (-ll): refetch all info
  • the daemon asynchronous logger is now solid and avoids sending empty critical messages
  • daemon CLI command to reload the config file
  • path checking interval gets longer when the path is reliably up, resets to short as soon as a problem occur
  • daemon implements 3 path group failback methods:
    • manual
    • immediate: failback as soon as an (enabled && !active) PG gets the highest priority
    • defered: failback to the highest priority (enabled && !active) PG n seconds after the last PG priority order change
  • remove over-complicated and thread-confusing daemon initial clone() w/ private namespace
  • prioritizers official prefix is now mpath_prio_
  • multipath(8) displays PG priorities when available
  • new hp_sw checker. It's a tri-state UP/DOWN/GHOST
  • new directio checker. Useful with DASD devices.
  • stricter default blacklist regexps
  • new '-f' multipath(8) flag to selectively suppress a multipath map, and its device-mapped partitions
  • alua prioritizer update, should work on x86
  • support for >2TB multipaths
  • claimed device detection: no more warning/error messages with paths pinned by mounted FS
  • option to use priorities as weights in the round-robin scheduler: for people who can't wait for a qlen-based scheduler

Solution

Please install the updates provided at the location noted below.

Installation notes

This update is provided as an RPM package that can easily be installed onto a running system by using this command:
rpm -Fvh multipath-tools.rpm

links to download packages

Download Source Packages

Download the source code of the patches for maintained products.


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