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A customer currently uses XtremIO native remote replication with four RPAs and a 1 GB WAN link to asynchronously protect all production dat
a. Management has decided that all data stored on the XtremIO must now be protected at the disaster recovery site by synchronous replication.
How can this be achieved?
XtremIO with VPLEX provides for both synchronous and asynchronous replication.
Note: The engine of RecoverPoint is the RecoverPoint Appliance (RPA).
A customer has decided to use VMware Horizon View as their desktop virtualization technology. Their VDI environment will consist of XtremIO storage and ESXi hosts. They are looking for increased speed and low latencies while performing file copy operations.
What should the setting for VAAI XCOPY I/O size be set to in order to achieve this requirement?
The VAAI XCOPY I/O size of 256 kB gives the best performance. 4 MB is the default value.
References: https://www.emc.com/collateral/white-papers/h14279-wp-vmware-horizon-xtremio-design-considerations.pdf, page 57
A storage administrator is configuring SAN switches and zoning to connect an eight X-Brick XtremIO array. A VMware ESXi server is hosted on a blade chassis with 16 HBA ports. In addition, the SAN is composed of two separate SAN switches.
What is the recommended XtremIO best practice for zoning?
In an environment where a host with two HBAs (VMware Best Practice) is connected to two fabrics and storage array with two Storage Controllers (EMC VNX, for example) the host will have four paths to a LUN: 2 Controllers x 2 HBAs = 4 paths
If you go to the extreme and configure your XtremIO with eight X-Brick, you have 16 controllers. Again, two HBAs per host and the max number of LUNs you can attach to an ESXi host will be 32... I understand, different OS'es may have different limits than VMware and this logic will not be applicable.
If you have hit the limit of 1024 paths per host (1024 / 4 controllers / 2 HBAs = 128 LUNs) and need to provision more LUNs, the best way will be to re-zone the host to limit the number of X-Bricks / Controllers the host HBA can connect to.
The following diagram displays the logical connection topology for 4 paths.
You need to design an Oracle solution for a customer. Which XtremIO best practices should be used in Oracle environments?
The default setting for XtremIO volumes is 512e. It is recommended not to alter this in order to use 4K Advanced Format for Oracle Database deployments. There are no performance ramifications when using 512e volumes in conjunction with an Oracle database. On the contrary, 4K Advanced Format is rejected by many elements of the Oracle and Linux operating system stack.
References:https://www.emc.com/collateral/white-papers/h13497-oracle-best-practices-xtremio-wp.pdf, page 20
When creating XtremIO volumes for a host, which operating systems will benefit by changing the default logical block size for applications consisting of 4 KB I/Os?
With VMware ESX 5.5, the VMware hypervisor cannot work with LUNs that use a logical block size of 4K. When using VMware, be sure to specify Normal (512 LBs) from your XtremIO array.
References:https://gruffdba.wordpress.com/2015/08/02/4k-logical-block-size-size-fails-on-vmware/
