`Hey,
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queries.
- Erratic/unpredictable application
performance. Attaching more virtual machines (VMs) to
a storage system does more than increase the overall workload on
it. The applications on multiple VMs place varying, unpredictable
and sometimes competing performance demands on the storage system.
Workloads that were independent suddenly have an impact on other
workloads in a shared storage environment.
- Impact of storage system maintenance/outages more
acute. The more VMs that access the storage system,
the more critical it is that the storage system remains available
at all times even when “routine” events occur such as
applying firmware patches or doing hardware upgrades.
- Need to effectively scale storage capacity or
performance. Storage systems may be able to handle
server virtualization’s initial performance hit but as more VMs are
added, storage performance degrades requiring costly hardware
upgrades or even the acquisition of additional storage
systems.
- Need for multiple storage networking protocols to
economically consolidate VMs. Organizations are
continually looking to consolidate VMs while using the most
economical and efficient storage networking protocols available for
each application to access the backend storage system. Storage
systems that support a concurrent mix of storage networking
protocols (CIFS, FC, iSCSI, NFS, etc.) provide organizations the
best opportunity to achieve that objective.
- Storage allocation/reallocation made even more
difficult. Once a VM is connected to the storage
system, the storage system needs to provide the flexibility to add,
remove and re-appropriate storage as needed without requiring a
great deal of time or special skills to accomplish these
tasks.
- Visibility into the storage array. As
server virtualization deployments grow, knowing what application
data resides where within the storage array becomes more critical
to avoid potential performance bottlenecks or troubleshoot them
when they occur.
- Efficiently managing storage growth.
More VMs means more data to store with new performance
requirements. However scaling storage capacity can be a tricky
proposition. IT is often forced to decide between upgrading an
existing storage system and acquiring a second one while trying to
make sure the new costs associated with powering on these drives do
not break the budget.
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