![]() ಠ_ಠĪnyway, boss man wants to take home a full backup once a month and then daily incrementals. I also need copies of those here in case we need to recover files off of tape. ![]() I was thinking of a LTO5 tape duplicator, but this thing is $19k, and won't get approved. One thought I had is using rsync to direct incremental backups to a daily directory and then making two full copies of that directory to tape. Since I'm using ZFS on Solaris, another thought would be sending daily snapshots to a folder and then backing that directory up on either tape or 2.5 HD. A 500GB hard drive is much cheaper than tape, and since the media will be rotated on a monthly basis it doesn't have to have a 5 year shelf life. ![]() IT best practices aren't practiced around here, so please give it to me with both barrels if need be.Even Symantec NetBackup Appliances (which are carefully specified, built, and tuned) are only 'unofficially' capable of driving two tape drives, and this is also 'unofficially' only when they are quiet - i.e. Not having to perform backups, and are thus free to duplicate (re-hydrate) to tape. To build your own server capable of reaching these levels, or exceeding them, requires very careful system design, and a pocket full of money to specify/purchase/build a powerful server. So if you have 10 TB to duplicate to tape, and you have have a server capable of re-hydrating (sustained random read IOPs/throughput) and thus capable of reading MSDP disk at 120 MB/s - to match the typical minimum sustained write throughput of 120 MB/s to one LTO6 tape drive - then if you had 10TB to duplicate to tape, it would take 24 hours: 10.0 Here's a simple calculation, which assumes that your server is even capable of this. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |