Hp "Offsite" mirroring possible?

[Michael_238]

I have an rp7410 with a single partiton running hp 11.11. We have a jbod with 6 drives using LVM with Raid 1+0. We were wondering what (if posibble at all) it would take to imlement an offsite checkpoint mirroring system? Within our wan or outside it, it doesn't matter. I figured that there was some kind of software that could do this? Veritas or similar? Does this make sense?

[RAC_1]

That makes sense. If whole of the site goes down, another sould take over.

Veritas has a product as "Veritas Volume Replicator" Don't know the details.

You can rather create a static copy of your root disks and ship them to other site. Keep updating the static copy on daily/weekly/monthly basic. With this you will have root disks(vg00) ready at other site. Non-vg data will have to be backed up and restored onto the other site.

Anil

[Tim Sanko]

I would consider using a script that would use mirror disk to periodically mirror drives offsite across a wan.

If you have a SAN
And piggyback across the wan
with a series of drives on the san,
you could do it cheap and be Da Man.

(excuse the poetry.)

Tim Sanko

The real issue is matching the lvol sizes on the targets. If you like the poetry, you are as bored as I am....

[Bill Hassell]

Before attempting LAN-based mirroring, you need to examine the maximum data rates that you will be requiring. A DSL or T1 line can't begin to keep up with even a slow JBOD. Similarly, a 100Mbit LAN is far too slow (about 5Mb/sec) for even a single disk. So even a T3/DS3 line (at a measly 45Mbits) will be too slow.

Now a good database system doesn't usually access the disks 100% of the time, but without quite sophisticated wide area mirroring software, your local performance will drop drastically. Mirroring requires that all mirrors complete a write task before proceeding. That means that local disk throughput will be handicapped by the network. If your disk activties are idle at night, you might look at synchronizing during off-hours. This would not be a realtime mirror where the offsite location takes over immediately. Note that if you have an unlimited WAN budget, you might look at Gigabit LAN and a fiber WAN link.