Animesh Singh wrote:
There should be little to no data loss in soultion.
...
What will be the best way to have Disaster Recovery of site ( File & Print and Messaging Soluton. ). at remote location with approx. 300 km. distance. & with 2Mbps link.
There can never be `no data loss'. Some data is always lost in such incidents where a whole site goes down. As Kishor said, you need to decide how much days/hours worth of data you can afford to lose. Given that you need to have a DR site for File & Print servers, Print servers do not store any data permanently. So you can rule them out. File servers will typically have data that is not modified at every instant per se. The data is static over a couple of hours. But the size and amount of data transaction is not known. So one cannot tell whether you need a fibre channel to your DR site or a 64kbps leased line will suffice. Same argument holds for messaging servers.
The alternatives, dependent upon the evaluation of the computer function, may include: hot, warm, or cold sites reciprocal agreements, two data centers, multiple computers, service centers, consortium arrangement, vendor supplied equipment, or a combinations of all of these. My objective is to achive best using Opensource technology.
None of these can be achieved using software technologies. Now comes the question of your main question - open source DR tools. You have these options for Linux/*nix -
1. journalling file system 2. tar, gunzip 3. dd, cp 4. fsck 5. taper, cdrw-taper 6. linux single 7. http://linux-ha.org/ 8. http://www.linuxvirtualserver.org/ 9. and so on...
For Windows you have -
1. System Restore 2. Last known Good configuration 3. Device Driver Roll Back 4. Automated System Recovery 5. Tons of proprietory tools 6. etcetra.
Is that what you wanted? Or are you looking for a one-stop-shop for all your DR needs? IMHO, it is not possible. You have to look at hundreds of parameters before you actually decide how you are going to 1) Plan on a DR site 2) Maintain a DR site 3) Making it work when the d-day arrives. No technology can help you do all that.
Nilesh.