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A Red Hat training course is available for Red Hat Gluster Storage

Chapter 2. What's New in this Release?

This chapter describes the key features and changes in the Red Hat Storage 3.0 update 4 release.
  • Support for Just a Bunch of Disks
    • Red Hat Storage supports Just a Bunch Of Disks (JBOD) on servers with up to 24 disks. The complexity of RAID is avoided by using 3-way replication with JBOD.
  • Three-way replication
    • Synchronous three-way replication is now fully supported in Red Hat Storage volumes. Three-way replicated volumes do not require hardware or software RAID. Three-way replication yields best results when used in conjunction with JBODs. Quorum functionality on three-way replicated volumes helps to prevent split-brain scenarios. 3-way replicated volumes provide additional resilience in public cloud deployments as well.
      Three-way replication is also supported for Hadoop Deployments.
  • Performance Enhancements
    • Event threads: Two new performance enhancement options namely event-thread.client and event-thread.server are introduced. Configuring appropriate values minimizes the effect of slow throughput and response time in a Red Hat Storage trusted storage pool.
    • Virtual Memory parameters: Two new virtual memory parameters can be configured to optimize performance of random, small file workloads and large file sequential workloads.
  • Change in the location of the Gluster command log file
    Gluster commands executed on a node in the Red Hat Storage Truster Storage Pool is logged in the file /var/log/glusterfs/cmd_history.log. It is no longer a hidden file.
  • Samba-3 is deprecated from the Red Hat Storage 3.0 Update 4 release
    The Samba version 3 is being deprecated from RHS 3.0 Update 4. Further updates will not be provided for Samba-3.x. It is recommended that you upgrade to Samba-4.x, which is provided in a separate channel or repository, for all updates including the security updates.
    RHN channel: rhel-x86_64-server-6-rh-gluster-3-samba
    CDN repo: rh-gluster-3-samba-for-rhel-6-server-rpms
  • The gluster CLI sub package is deprecated from the Red Hat Enterprise Linux optional channel
    The glusterfs-cli sub-package is removed from the product listing for rhel-optional channel or repository. No further versions of the sub-package will be shipped to the rhel-optional channel or repository.
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