Re: Bare Metal Restore sizing.
A noteworthy point. You can use the AIX 433 install CD to create the AIX 4.3 SRT. It can then handle AIX 4.3.1, 4.3.2, or 4.3.3. Generally, you want to use the latest relese of the level of the OS to build the SRT. Zlatko Krastev/ACIT wrote: Ray, let me point small and very rare but important issue: If you update AIX 4.3(.1) to 4.3.2 or 4.3.3 you have the ability to change a volume group to big volume group using chlv -B If you make a mistake to change to rootvg to big vg AIX 4.3 and 4.3.1 are completely uncapable to handle it. I am not yet familiar with details of TKG's BMR products and didn't read their docs. But even on an pure AIX complex (no TSM, no BMR) if and only if we do have an administrator (if I do this I would be very silly) which extended rootvg beyond limits of normal vg he will have to be sure that boot image is created from 4.3.[23]. Just some thoughts for something I hope will never happen. Girls and guys, has someone already done it ;-) Zlatko Krastev IT Consultant How often are the boot images refreshed? How BMR is going to realize that a client has upgraded its OS, when others have not? BMR does not currently validate the boot images. You will need to update the boot image when the client has a major OS level change (For AIX that would mean if the machine is upgraded from 4.1 to 4.2, but not from 4.3.2 to 4.3.3. ). The boot image creation does not take a long time, and it can be done regardless of the state of the client. The BMR database holds enough information about the client to help you build the correct boot image. -- Ray Schafer The Kernel Group www.tkg.com http://www.tkg.com Sr. Sales Engineer [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]+1 512 433 3300 -- Ray Schafer The Kernel Group www.tkg.com Sr. Sales Engineer [EMAIL PROTECTED]+1 512 433 3300
Re: Bare Metal Restore sizing.
Eduardo, My comments are interspersed. Eduardo Martinez wrote: Hi All. Has anyone of you ever sized an BMR solution? I have several doubts about it. A) Space requirements for BMR software installation TKG says the following: The BMR server requires 4 megabytes of disk space plus approximately 1 KB of disk space for every 2 clients. Each Boot image on the Boot Server will require 100 to 800 KB of disk space. How much space am I going to need for each boot image? AIX Boot images are about 6 to 8 megabytes each. They are stored in /tftpboot on the Boot server. Is a boot image created for each of my clients? if so, am BMR is going to backup a boot image each time the client is backed up? in this case I have to calculate the space on disk according the backup policies for each one of my clients. or am I going to create ONLY one boot image per platform I 'm going to backup (one image for SUN, another for NT, another for AIX)? This way I'm going to use much less space than the above scenario. AIX boot images are are built using 3 parameters: Architecture, Processors, and Network type. The possible architectures are rspc, rs6k, or chrp. The possible processor types are up or mp, the possible Network types are ent or tok. So there are 12 possible boot images for each AIX SRT. There are currently 4 different AIX SRT's you can have on a File Server. (AIX 4.1, 4.2, 4.3, and 5.1). Solaris Boot Images are very small (200 KB) and you only need one for each SRT. NT boot images are just BMR database place holders. They take up no space, BMR does not use network boot for NT. NT is always booted from a BMR Floppy. How often are the boot images refreshed? How BMR is going to realize that a client has upgraded its OS, when others have not? BMR does not currently validate the boot images. You will need to update the boot image when the client has a major OS level change (For AIX that would mean if the machine is upgraded from 4.1 to 4.2, but not from 4.3.2 to 4.3.3. ). The boot image creation does not take a long time, and it can be done regardless of the state of the client. The BMR database holds enough information about the client to help you build the correct boot image. B) Shared Root Tree For the SRT TKG states: Each Shared Root Tree (SRT) on the File server will require 200 to 400 MB of disk space. The same questions as above. Is a SRT created each time a client is backed up? No. Once an SRT is created, it is shared among many clients. I've calculated the space Im going to need considering I have 6 clients (2 sun, 2 aix and 2 NTs), also that I only need one boot image per platform (3 in this case), and also one SRT per platform too. This makes a total of 606 MB. Are this calculations right? Your calculations are about right. You will need 3 SRT's, one for NT, one for AIX, and one Solaris. The SRT's will total about 600 MB. Each platform varies in the amount of disk space required for the SRT, and it depends on the OEM drivers and utilities that are added to the SRT to support the clients. So 200 MB is an average. NT takes about 100 MB, AIX takes about 300 MB, and Solaris takes about 200 MB. BMR Server BMR Server 1 4MB BMR Client 6 3.0Kb Boot Server Boot image 3 2MB File Server Shared Root Tree (SRT) 3 600 MB Total 606MB Thanks in advance. = Do or Do Not, there is no try -Yoda. The Empire Strikes Back ___ Do You Yahoo!? Yahoo! Messenger: Comunicacisn instantanea gratis con tu gente - http://messenger.yahoo.es -- Ray Schafer The Kernel Group www.tkg.com http://www.tkg.com Sr. Sales Engineer [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]+1 512 433 3300
Bare Metal Restore sizing.
Hi All. Has anyone of you ever sized an BMR solution? I have several doubts about it. A) Space requirements for BMR software installation TKG says the following: The BMR server requires 4 megabytes of disk space plus approximately 1 KB of disk space for every 2 clients. Each Boot image on the Boot Server will require 100 to 800 KB of disk space. How much space am I going to need for each boot image? Is a boot image created for each of my clients? if so, am BMR is going to backup a boot image each time the client is backed up? in this case I have to calculate the space on disk according the backup policies for each one of my clients. or am I going to create ONLY one boot image per platform I 'm going to backup (one image for SUN, another for NT, another for AIX)? This way I'm going to use much less space than the above scenario. How often are the boot images refreshed? How BMR is going to realize that a client has upgraded its OS, when others have not? B) Shared Root Tree For the SRT TKG states: Each Shared Root Tree (SRT) on the File server will require 200 to 400 MB of disk space. The same questions as above. Is a SRT created each time a client is backed up? I've calculated the space Im going to need considering I have 6 clients (2 sun, 2 aix and 2 NTs), also that I only need one boot image per platform (3 in this case), and also one SRT per platform too. This makes a total of 606 MB. Are this calculations right? BMR Server BMR Server 1 4MB BMR Client 6 3.0Kb Boot Server Boot image 3 2MB File Server Shared Root Tree (SRT) 3 600 MB Total 606MB Thanks in advance. = Do or Do Not, there is no try -Yoda. The Empire Strikes Back ___ Do You Yahoo!? Yahoo! Messenger: Comunicacisn instantanea gratis con tu gente - http://messenger.yahoo.es
