Thanks for the advise. I understand you have asked me some questions and that is actually making me think of more points to be considered while sizing and make correct decisions. Some of the points that you have mentioned I did not really think of them when I started. Thanks for pointing them out.
One thing I am confused about and want to confirm do I really need to use spanning in Virtual tapes ? This document here mentions that one doesn't need to configure 'runtapes' variable with vtapes but looking at amdump o/p in previous email I think I must mention 'runtape' Now back to the questions. @Charles * Are you planning to back up vtapes to DVD? If not, I'd say, don't worry about the 4 G size and pick something that suits your data set. No I am not planning on that. I think I better make tapesize larger like 40G or so @Brian *You talk in terms of 'new data' each day, do you touch existing files ? It will be modification of exsiting files as well as addition of directories and more files and may involve removal of directories/files. *How many DLEs, disklist entries, will you have, what are their relative sizes ? Only 1 entry for a amanda-network client server. Size is about 50G and grows by 100M-200M a day or data size sometimes stays as it is for 2-3 days. *Did you plan on using the VTape pool for anything else ? No but I think I did not mention that actual filesystem size of RAID5 storage mounted is 300G and I only created 20 tapes of 4.x G size on it. I don't plan to use the remaining space for anything else. *How large are your DLEs ? Are they actually all small enough to expect level 0 dumps to fit on 4 gig volumes ? I have only 1 DLE in disklist and DUMP 0 will be of about 50G therefore won't fit on a single 4GB volume(vtape) however Ithought Amanda will span it automatically for Virtual tapes. *Ah - how many DVD do you typically write per day now ? *Is that all level 0 or a mix of 0 and non-0 dumps ? No I don't write DVDs actually, it is just named DVD as per the wiki example. I have tried taking manual dumps using amdump and they fail as in my earlier email :( . Once it is confirmed amdump works manually I will let Amanda do this automatically. *Are you manually intermixing the levels now to even out dump times across your week ? No I don't plan on doing that. I am only trying to do amdump for testing if a Backup job works or no. *What is the structure of your vtape pool ? It is a directory with 1 slot and 20 vtaps. This directory resides on a sotrage mount which itself is RAID5 configured. size of /blah is 300GB lrwxrwxrwx 1 amanda sys 50 Nov 23 12:32 data -> /blah/amanda/vtapes/test/slots/slot2 -rw------- 1 amanda sys 15 Nov 23 13:13 info drwxr-xr-x 2 amanda sys 512 Nov 23 11:07 slot1 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot10 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot11 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot12 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot13 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot14 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot15 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot16 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot17 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot18 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot19 drwxr-xr-x 2 amanda sys 512 Nov 23 13:13 slot2 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot20 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot3 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot4 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot5 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot6 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot7 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot8 drwxr-xr-x 2 amanda sys 512 Nov 23 10:27 slot9 cat tapelist 0 TEST-20 reuse 0 TEST-19 reuse 0 TEST-18 reuse 0 TEST-17 reuse 0 TEST-16 reuse 0 TEST-15 reuse 0 TEST-14 reuse 0 TEST-13 reuse 0 TEST-12 reuse 0 TEST-11 reuse 0 TEST-10 reuse 0 TEST-9 reuse 0 TEST-8 reuse 0 TEST-7 reuse 0 TEST-6 reuse 0 TEST-5 reuse 0 TEST-4 reuse 0 TEST-3 reuse 0 TEST-2 reuse 0 TEST-1 reuse *Do you need to think in terms of off-site storage for disaster recovery ? No I don't think I will be doing that. Don't want any redundancy for now because there is already RAID5 on DAS. *Are you worried about data recovery if you lose the vtape Nope, Mount is RAID 5 so don't think it will be a big problem pool as well as files/drives in your data pool ? +---------------------------------------------------------------------- |This was sent by [email protected] via Backup Central. |Forward SPAM to [email protected]. +----------------------------------------------------------------------
