Storage


FAST Cache Configuration Best Practice 11

EMC’s FAST Cache has been one of the most talked about technology in recent times due to the much needed Caching capabilities that it brings to EMC CLARiiON series of arrays. In a nut shell , FAST Cache is a collection of Enterprise Flash Drives that sits between Storage System’s DRAM Cache and Disks. FAST Cache holds a large percentage of the most frequently used data in high performance FLASH drive. While the response time of DRAM Cache is in nanoseconds , response time of FAST Cache is in terms on milliseconds. In my previous posts , I had explained on the Performance benefits that one could derive from FAST Cache on various work loads like VDI , Database etc.. We had an interesting discussion recently on the Configuration Best Practice for disks that constitute FAST Cache. Remember FAST Cache is a collection of Enterprise Flash Drives or SSD configured in RAID to provide Read & Write Caching capabilities. Scanning through EMC KB , Came across an Primus (ID: emc251589) on the Configuration Best Practice for FAST Cache and thought of sharing the same with the larger audience so that it could be useful when you configure the same in your environment. The Primus is being constantly updated and would recommend you to look […]


CLARiiON Storage Replication with Recover Point 3

One of the main aspects of any Disaster Recovery strategy has to be Storage Replication considering all critical applications & data are generally hosted on a highly available SAN Infrastructure. With growing influence of Virtualization on Data Center , Number of  Servers that are virtualized has been increasing and will continue to grow and replicating these VM’s is also critical. VMware provides SRM ( Site Recovery Manager ) as a DR solution for VMware VM’s in conjunction with Array Replication Technologies.Integration of Storage Replication technology with Products like VMware SRM which provides Disaster Recovery solutions for Virtual Machine’s would go a long way in automating the DR process. Replication can be local or remote and also can be synchronous or Asynchronous.  Based on various tests that we carried out for both local and remote replication ,  Recover Point seems to be a better solution and in this post I would try and share my thoughts on the same. There are 3 EMC Replication technologies that can be utilized for replication of data that is available on a CLARiiON array and they are : Snap View Mirror View Recover Point Below snapshot from EMC RecoverPoint/SE Applied technology white paper shows the differences between various Storage Replication technologies of EMC : There are two […]


FAST Cache and VDI 3

In continuation to my earlier post on impact of  FAST Cache on database and Virtual Machine workloads , this post will show some statistics of FAST Cache on VDI workloads. VDI or Virtual Desktop infrastructure workloads are always challenging because of the components that construct them. OS drives and User Profile drives forms the major components with additional components varying from vendor to vendor like space used for Write Cache , Disposable disks , replica disks etc.. Typically OS Drives are from SAN device while the User Profiles are carved out of NAS. From my earlier experience with FAST Cache on SAN drives , I was pretty confident of a good performance from FAST Cache of my SAN components of the VDI infrastructure but was skeptical on the its performance for NAS workloads.FAST Cache can play a major role in enhancing the end-user experience by increasing the disk performance that constitutes VDI. Below shown data on VDI and FAST Cache are from my experience and could vary based on the user load , components and how they are configured  but this post is to give a fair bit of idea on the performance of FAST Cache on VDI work environments. I would not be covering how […]