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New Member

Bandwidth requirement for Storage over WAN

Working on a project for storing data across geographically dispersed locations, I need to be able to estimate how much bandwidth that will be required to do remote mirroring. I assume the initial data has been loaded on my backup servers at the 2 locations but I need to have a fair idea of how much bandwidth remote mirroring will translate to for approx 1Gb change in my main site server data.

Could anyone please help out.

New Member

Re: Bandwidth requirement for Storage over WAN

The amount of bandwidth required will be a function of two details. 1) what is the timeframe that the change takes place over? ie. does the 1gb change happen in 1 hr, 1 day, or 1 week? and 2) Since this remote mirroring will be async, how much delta between the databases are you willing to allow? ie. can the remote be 1 min out of sync, 10 min out of sync, or more? Since most db work is bursty, if we are given longer periods to sync the data, we can use a lower bw link.

These two questions need to be thought about and answered before a good answer can be given. You need to balance the cost of lost data vs. the cost of higher throughput circuits.

New Member

Re: Bandwidth requirement for Storage over WAN

The changes will take place virtually often, activity will always go on.

On how much delta between the database, we can still allow a time frame of about an hour or more.

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