Redundency Server ESX/EXi using storage internal

I use ESXi to run a few rarely used VMs.  ESXi is running a server with internal storage.  ESXi having no backup capabilities, I would install another ESXi server and to keep the two synchronized in the case where the primary server goes down.

First of all, is it possible with ESXi?  Or do I need to buy an ESX license for two servers and also buy and use VMotion to keep synchronized?

Second, what is the maximum RAM ESXi or ESX 3.5 will support?

Thank you

Shannon

Hello

I use ESXi to run a few rarely used VMs.  ESXi is running a server with internal storage.  ESXi having no backup capabilities, I would install another ESXi server and to keep the two synchronized in the case where the primary server goes down.

ESXi backup can be performed using the latest version of Veeam Backup. So, that exists now.

First of all, is it possible with ESXi?  Or do I need to buy an ESX license for two servers and also buy and use VMotion to keep synchronized?

You could look at VM level replication (Doubletake, etc.). VMDK (vReplicator, Veeam Backup) level replication. Or watch in Xtravirt XVS or HP Lefthand Networks VSA as alternatives.  These last two options will synchronize local storage between multiple hosts. XVS is limited to 2 guests and 1 handles LUN but VSA more. XVS is also free.

Best regards
Edward L. Haletky
VMware communities user moderator, VMware vExpert 2009
====
Author of the book ' VMWare ESX Server in the enterprise: planning and securing virtualization servers, Copyright 2008 Pearson Education.
Blue gears and SearchVMware Pro items - top of page links of security virtualization - Security Virtualization Round Table Podcast

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