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CFS Update SE Interlock 2006

CFS Update SE Interlock 2006. Oscar Wahlberg. Agenda. Dedicated PM/TPM What is new in 5.0 Multiple Transaction Servers Nested Mounts Improvements to CVM and DMP Use cases. What’s new in 5.0. New CFS architecture – Multiple Transaction Servers Nested mounts

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CFS Update SE Interlock 2006

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  1. CFS UpdateSE Interlock 2006 Oscar Wahlberg

  2. Agenda • Dedicated PM/TPM • What is new in 5.0 • Multiple Transaction Servers • Nested Mounts • Improvements to CVM and DMP • Use cases

  3. What’s new in 5.0 • New CFS architecture – Multiple Transaction Servers • Nested mounts • CVM and DMP changes that directly address customer pain-points • 32-node support • Infiniband support – first release with 5.0 MP1

  4. Current limitations in 4.x • File system transactions done primarily by one master node per file system • That node becomes the bottleneck in transaction intensive workloads • The amount of transactions performed locally has been improved in both 4.0 and 4.1 - but it is still the bottleneck • Acceptable performance for some workloads, not for others – hard to qualify sales Metadata/Data CFS Data Data Data

  5. Multiple Transaction Servers • All nodes in the cluster can perform transactions – No need to manually balance the load • Not directly visible to end users • Administrative commands can be executed from all nodes • Support for additional mount options delaylog, tmplog • Initial performance test indicates linear scalability • Scale-out capabilities have increased dramatically with MTS and 32-node support • Gotcha’s • MTS requires file system layout 6 • QuickLog no longer supported – Use MVS CFS Metadata/Data Metadata/Data Metadata/Data Metadata/Data

  6. Customer Access Program - MTS • Exact dates are not decided yet - expect Q1 • Good candidates: • Current CFS customers that have had or have performance problems • Customers with good knowledge about SF and VCS • Contact PM directly – Oscar Wahlberg

  7. Nested Mounts • Requested by customers since v3.5 • Enables: /cfs1 - First file system /cfs1/second - Second file system • Only available for VxFS/CFS

  8. Improvements to CVM and DMP • CVM improvements • Change from a serialized to parallel protocol for cluster reconfiguration • Significantly reduces cluster startup and reconfiguration time • Fewer (no?) node timeouts/failed node starts • Enhancements to I/O fencing • DMP updates include • Polling and better utilization of HBA information • Completely redesigned way of handling failover/failback and intermittent errors

  9. Use Cases – When can CFS help? • SAP – High availability with SFCFS/HA • ~ $1M in 2005 • Potential up-sell for all customers using VCS to cluster SAP • Solves NFS cross-mount problems and shortens failover time • Tibco EMS – Fast failover of message queues • Good traction – Several large deals last year and more in the pipeline • With CFS Tibco can fail over a message queue in <10s • Improving throughput and availability of the message queue solves business problems • Parallel Applications – When to promote CFS • Almost any application that share data among multiple nodes • If NFS can be used to share the data – CFS can be used • Except in heterogeneous environments • Examples: FTP/Web/Streaming/E-Mail/Image and document storage • Parallel NFS file servers • With MTS we have a much stronger story – no need to manually load balance • NFS is not CIFS – Still no integration between the two • Fast-Failover for Applications and Databases • For a large number of file systems removing the deport/import stages of a failover can cut a non-trivial amount of time from the failover

  10. Thank You! Oscar Wahlberg oscar_wahlberg@symantec.com

  11. Competitive update • Head-to-head competition most notably seen on Linux from both PolyServe and RedHat GFS • Dell has started to go after HPC customers together with EMC and IBRIX • QFS and GPFS are still on the market, but not making any waves • Weak spots • Heterogeneous OS support • Very large clusters 100’s of nodes • Rolling upgrades

  12. Infiniband • First release is targeted specifically at Storage Foundation Cluster File System • GA date is with 5.0MP1 for Linux • Based on TopSpin API • RedHat x86_64 only

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