August 21, 2019 Vignesh Sathiyanantham

In the recent posts, I shared about taking backup and restore of database and also discussed some of the issues I have seen in the customer environment and how I fixed those in Nimesa Software Nimesa uses cloud-native / storage native snapshot technology to provide the backup, backup copy to DR site, restore on primary, restore on secondary, power and cost management everything in a single Software suite for both public cloud and the private cloud. Currently, Nimesa is available as a community AMI in the Amazon marketplace. The AWS Marketplace is a curated digital catalog that makes it easy…

August 21, 2019 Vignesh Sathiyanantham

Recovery Point Objective (RPO) and Recovery Time Objective (RTO) are two of the most important parameters of the disaster recovery (DR) or data protection planning. These are the objectives/decision points for choosing the optimal backup software. Recovery Point Objective (RPO) Recovery Point Objective (RPO) describes up to what point in time could the business-critical data can be recovered in other words the last point where the data is in a usable format If you back up all or most of your data in regularly scheduled 24-hour increments, then in the worst-case scenario you will lose 24 hours’ worth of data….

August 21, 2019 Vignesh Sathiyanantham

Who uses MongoDB? Based on the online resource* there are 37,658 Companies using MongoDB, MongoDB is most often used by companies with 10-50 employees and 1M-10M dollars in revenue, and the market share is about 5.0% and also many financial services using the MongoDB Data is always critical whether its RDBMS or NoSQL or Flat files AWS EBS Volume Snapshot is block-level incremental snapshots, which is one of the best and efficient way to protect the Data in the EC2 environment, you might have read lots of posts, whitepapers about advantages of using the snapshot technology. But the Snapshots of…

August 18, 2019 Vignesh Sathiyanantham

In my previous blog, I discussed how to set up the ZFS File system in Ubuntu 18.04 and setup ZVOL for Microsoft SQL Server Databases In this post let’s discuss on how to set up the Disaster recovery plan for the Microsoft SQL Database with the ZFS replication, For that, I set up the Ubuntu 18.04 Instance in us-east-1 in availability zone us-east-1c , and ssh into the instance using the pem file Then I followed my post on ZVOL for MS SQL Database to install the ZFS on the AWS Linux Instance And then with the new volume, I…

August 18, 2019 Vignesh Sathiyanantham

When I am setting up the Disaster recovery plan for the MS SQL Databases in ZFS Volume, I faced permission issue while running ZFS send/receive command from a non-root account root@vigneshzfs:/home/vignesh# sudo zfs send sql-pool/disk1@aug18 | ssh ubuntu@10.7.8.25 zfs recv aws-pool/sql-pool-aug18 ubuntu@10.7.8.25’s password: cannot receive new filesystem stream: permission denied So my sender is vignesh and the receiver is ubuntu both are a non-root account On the sender side, I used these permissions sudo zfs allow -u vignesh send,snapshot,hold sql-pool And on the receiver side sudo zfs allow -u ubuntu compression,mountpoint,create,mount,receive aws-pool After setting up this permission I can send…

May 2, 2019 Vignesh Sathiyanantham

Failure rate depends more on the number of disk blocks modified since the last snapshot of the EBS volume than the total size of the volume. EBS has a listed failure rate of 0.1% – 0.4% annually, compared to a commodity disk’s rate of 4%. At first glance, this appears to be great, but this is somewhat misleading as any real production setup will use some sort of RAID. Using a RAID 1 with two drives failing at 4% would give a failure rate of 0.16% annually, which appears to be line with EBS. As long as the failed drive…

April 12, 2019 Vignesh Sathiyanantham

To do some testing of the on going release of Nimesa which do the application aware ( AppAware ) Backup of Microsoft SQL Server Cluster on SQL 2016 i created a small powershell scripts which create ( actually restores ) the databases from Adventure Works backup file Change the total and volume drive letter in the below code and run it. If you want to have Data files (.mdf ) and Log Files (.ldf) in the same volume, set the volume1 and volume2 with same value If you want to create data and log files on different volume, set different…

April 10, 2019 Vignesh Sathiyanantham

PS C:\WINDOWS\system32> Set-ExecutionPolicy RemoteSigned PS C:\WINDOWS\system32> Set-PowerCLIConfiguration -InvalidCertificateAction Ignore PS C:\WINDOWS\system32> Connect-VIServer -Server servername Get-VM -name vignesh-VM-1 | Get-AdvancedSetting -Name ‘disk.EnableUUID’ If that command returns no result or the value is false, you won’t see the disk serial number inside your OS. To Enable to DISK UUID, Refer this blog disk-serial-number-is-not-set-for-windows-server-2016-on-vmware-vsphere/

December 25, 2018 Vignesh Sathiyanantham

Storage capacity consumed by multiple unnecessary data copies costs businesses as much as $44 billion annually, according to IDC. It estimates that redundant copies of the same data ( copy data) account for more than 60% of enterprise disk storage capacity. The redundant copies are compounded by rational practices intended to protect the business with multiple separate copies of production data like full backups, disaster recovery copy, test and dev, data analytics All the extra storage comes at a cost, data storage isn’t cheap, businesses have to waste more money on unnecessary storage expenses. There are many Copy Data management…

November 19, 2018 Vignesh Sathiyanantham

Backup applications for the Virtualized environment back up the Virtual Machine at the image level and are not aware of what is going on inside the installed guest operating system. So before you back up your Virtual Machines you should ensure they are quiesced so they are in a consistent state to be backed up. Quiesce is to pause or alter a device or application to achieve a consistent state, usually in preparation for a backup. The quiesce operation is handled inside the guest OS, and for Windows VMs, the Volume Shadow Copy Service (VSS) handles this. If you don’t…