nullnullDataCoreSANsymphony Planning and managementChapter 9 : Network Managed VolumesHow NMVs WorksHow NMVs WorksExample An application server might be assigned a 2 Terabyte NMV although the initial physical space reserved may only be 128MB.
Assigning a disk to an NMV Pool causes it to “Initialize.” The time it takes the initialization process to complete will depend of the size of the physical disk. Part of the initialization process carves the disk into 128MB Storage Units. As the application starts writing more data, SANsymphony transparently and automatically allocates additional storage units from the free pool.How NMVs WorksHow NMVs WorksDisk 1Disk 2Disk 3128 MB sliceStorage PoolHow NMVs WorksHow NMVs WorksVirtual Volumes as NMVs These NMVs are encapsulated into virtual volumes, as you would do for regular logical volumes. A visual representation for Network managed Volumes is shown below:Other NMV OptionsOther NMV OptionsIntroduction Here we discuss other options that you can set when working with NMVs. They include: ‧Resizing ‧Setting quotas
‧ Creating larger volumes The Benefit of Using NMVsThe Benefit of Using NMVs5 Key Benefits Separating capacity allocation from physical disk constrains using SANsymphony software returns five important cost reduction and productivity benefits. ‧Disk utilization is maximized since all free space remains in the global storage pool. ‧Applications only occupy space they are really using. This effectively stretches storage budgets by 60-70%. ‧Critical applications run undisturbed as their capacity requirements climb. ‧IT personnel no longer spend time responding to disk re-allocation and resizing requests. ‧Capacity planners have a much better understanding of their total disk needs to properly Said differently, Business applications run smoother, more predictably and cost less to operate and maintain after the introduction of SANsymphonys’s unique Network Managed Volumes.LABLABLAB Starting on Page 9-11 ~ 9-33
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