5 Replies Latest reply on Nov 15, 2013 6:39 PM by curtisi

    Storage type supported by LEM?

    trunks

      Hi,

      What type of external storage supported by LEM? Can we add external storage via ISCSI for example?

      If this is not possible, how can we assure the scalability in term of storage?

      Thank you

        • Re: Storage type supported by LEM?
          prawij

          Unfortunately it's not possible to use external storage like that, the max AFAIK with LEM 5.6 and what we are using is 2 TB of disk for logs/data. This is presented to the VMware image from a SAN array, connected via FC. Given current usage that will prob give us approx a year of alert retention

          • Re: Storage type supported by LEM?
            Heiko Maier

            Hi trunks,

             

            since we are looking at an appliance I don't understand your question.

            Of course you can add external Storage from some storage target.

            But keep in mind, that LEM can be a real IO generator based on the logs you are working with.

             

            /Heiko

            • Re: Storage type supported by LEM?
              curtisi

              Hey trunks, the major limiting factor in versions of LEM prior to 5.6 was the database architecture.  It couldn't be expanded to more than 1TB.  In 5.6 with the Lucene foundation (thanks prawij!) the sky is the limit...except that VMWare and HyperV (until very recently) only allowed a virtual machine to expand to 2TB.

               

              However, VMWare has released a new version of ESXi and VSphere.  If you take a look at this doc from VMWare, page 12:

               

              "vSphere Storage Enhancements

              VMware is increasing the maximum size of a virtual machine disk file (VMDK) in vSphere 5.5. The previous limit was 2TB—512 bytes. The new limit is 62TB. The maximum size of a virtual Raw Device Mapping (RDM) is also increasing, from 2TB—512 bytes to 62TB. Virtual machine snapshots also support this new size for delta disks that are created when a snapshot is taken of the virtual machine." - What’s New in VMware vSphere® 5.5 Platform, Document Version 1.3, Retrieved Nov 15 2013

               

              And Microsoft has improved HyperV in Server 2012 and Windows 8:

               

              "Virtual hard disk capacity:

              64 TB supported by the VHDX format introduced in Windows Server 2012 and Windows® 8; 2040 GB supported by the VHD format." - Hyper-V Scalability in Windows Server 2012, Updated June 24, 2013, Retrieved Nov 15 2013

               

              Which means you can theoretically throw 62TB at a 5.6+ version of the LEM, it will see the new disk space, and busy itself growing to fill that space.  That's a LOT of data!  So the limits in 5.6+ are more dependent on your platform and available resources than anything else now.