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Confidential Page 1 5/10/2016

Release Notes— Fluid Cache for SAN for Linux Systems

Release Notes— Fluid Cache for SAN 2.1.0 for Linux Systems

Build Version: 2.1.0

Updated 5/10/16

Summary of content (11 pages)

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Release Notes— Fluid Cache for SAN for Linux Systems Release Notes— Fluid Cache for SAN 2.1.0 for Linux Systems Build Version: 2.1.
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Release Notes— Fluid Cache for SAN for Linux Systems Contents PURPOSE OF THIS RELEASE .................................................................................................................................... 3 FIXED ISSUES IN THIS RELEASE ............................................................................................................................... 3 SOFTWARE AND HARDWARE COMPATIBILITY ...............................................................................................
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Release Notes— Fluid Cache for SAN for Linux Systems Purpose of this Release Fluid Cache for SAN for Linux 2.1.0 is a maintenance release with the following focus:     Add support for RHEL 6.7 Improve diagnostic capability when there are cluster issues Improve cluster shutdown robustness Fix stability issues and improve cluster operation Note: Installation and Upgrade instructions for 2.1.0 are in the Dell Fluid Cache for SAN Version 2.1.0 Admin and Deployment Guide for Linux Systems.
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Release Notes— Fluid Cache for SAN for Linux Systems   I/O timeouts and errors after cache network failure Data loss in multiple failure scenario Software and Hardware Compatibility See Dell Fluid Cache for SAN Compatibility Matrix available at dell.com/CacheSolutions Driver Required Version Table 1 Driver Required Version Element Required Version Mellanox ConnectX-3 OFED Drivers RHEL 6.7: 3.2-1.0.
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Release Notes— Fluid Cache for SAN for Linux Systems               openssl pam perl perl-XML-LibXML perl-XML-NamespaceSupport perl-XML-SAX per-YAML-LibYAML python sg3_utils-libs sg3_utils shadow-utils xmlsec1-openssl xmlsec1 zlib * Installed when you install the Mellanox OFED package. Installation Instructions Refer to the Admin and Deployment Guide for complete installation instructions.
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Release Notes— Fluid Cache for SAN for Linux Systems gpg --verify .sign A message appears, telling you that the verification resulted in a good signature. NOTE: If you have not validated the key as shown in the previous step, additional messages appear to warn you that the key was not certified with a trusted signature. Known Issues Arising from Third Party Software The following issues are not caused by Fluid Cache itself, but arise from known issues in third party software.
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Release Notes— Fluid Cache for SAN for Linux Systems WORKAROUND: Volume Manager is not supported by Fluid Cache, and should not be used to create volumes out of Fluid Cache disks. Instead, create a volume on the backend store, and then cache that volume. XFS Hangs During File System Creation ISSUE: On RHEL 6.4, the XFS files system may become unresponsive. During creation of the file system, this may occur because of a deadlock between the xfssyncd and xfsbufd daemons.
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Release Notes— Fluid Cache for SAN for Linux Systems WORKAROUND: None Ext4 Buffer Cache Does Not Empty ISSUE: When using the Ext4 file system, under certain circumstances the buffer cache may not completely empty. WORKAROUND: None Known Issues in Fluid Cache for SAN 2.0 The following are known issues in Fluid Cache for SAN 2.0.
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Release Notes— Fluid Cache for SAN for Linux Systems File Systems Table (fstab) Settings Prevent Server from Starting ISSUE: The server can fail to boot because of errors related to setting non-zero fs_passno field in the /etc/fstab file. Setting the force fsck option causes the system boot to fail. This is because the devices do not exist at boot time when fstab is processed. When the error occurs, the following message is displayed: /dev/fldc0 is mounted. e2fsck: Cannot continue, aborting.
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Release Notes— Fluid Cache for SAN for Linux Systems Root File System Fills Up ISSUE: Fluid Cache may fail and require manual intervention if the root file system on a node becomes full. The cluster may still be operational, but error messages are generated and Fluid Cache is not fully functional. WORKAROUND: Please contact Dell Customer Support for the steps required to return the node to full functionality.
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Release Notes— Fluid Cache for SAN for Linux Systems Use of Kpartx to Partition Volumes ISSUE: When using the kpartx command to partition volumes, the partition table on shared block devices is in an inconsistent state across the cluster. For instance, partitions created on a LUN on one node may not be seen by other nodes. WORKAROUND: Kpartx is not supported for partitioning a cached volume. Use the partprobe command instead.