There are some many strategies that can be employed when it comes to backup of data and information. One of the plans that one can use is through back up technologies. In this case, one can use traditional tapes and disks. This is the most economic and cheap way to carry out some backup although in some other cases, one might use disk backup or optical media backup. With the use of optical storage media, one can store very large amounts of data in a very small space.
One can also have database backup where there are two methods. First, there is the replication where one takes all the data and information on one machine and copy it to another machine. That way, there is always an exact replica of data on the machines so that if data on one machine is lost, then one can obtain the same data from another machine. The other backup method is online database backup.
Email database backups not only provide backup facilities but also provide regulatory requirements and compliance requirements to store such data over a long period of time. In this backup strategy, one is not only able to back up the whole email server but also mailboxes and individual messages. This means that if a user deleted a message from the mailbox, one can use recovery software to get to the database and restore the deleted message.
One can also use snapshots. This is a type of utility provided by virtual machine (vm), virtual private server (vps) where one are in a position to back up files that are open and being used by the operating system with the help of the Shadow Copy Service. One can have an exact duplicate of the files even if they are being used at the specific time.
Another backup strategy used in home environments and large organizations is the image copy where one takes everything on the system and makes an exact duplicate of the same and then copy it to an image file.
Backup execution/frequency: Backup execution is normally done so as to give one the ability to restore a file even if one loses it. A backup copies all the data one has and creates a duplicate version of it.
One can decide to have a full backup execution. This is a kind of backup where one copies every piece of file on one's system. One can also decide to do an incremental backup where one decides to backup all files that have changed since one's last incremental backup. There is also another concept of the differential backup. This one is quite different from incremental in that is creates a backup of all files that have changes since one's last full backup. Each backup strategy has its pros and cons.
One can also approach backup execution in terms of the data retention period. First, one might choose to have a short-term backup. This means that one retain files that have recently changed for version control. Long-term backup is also another option where one keeps files and information for legal requirements or company policies.
Cold site: The cold site backup facility is viewed as a disaster recovery site that is an empty building. This means that there could be some cooling systems and other backup systems but no hardware in it. This therefore means that should an emergency occur, it is one's responsibility to bring along all the items required. This is a facility where there is no data stored so one must be conversant of ways in which one can bring data to the site. There are also no people in this disaster recovery facility and therefore one may choose to come with one's own team.
Hot site: A hot site is a recovery facility where one has a duplicate of everything, all the systems are up and running and one have a complete duplicate of a data centre. In this case, when one is buying hardware, one buy duplicates of hardware in the hot site. It's like buying everything in twos. Applications and software also constantly updated hence creating a sort of automatic replication of every component. In the case of a hot site, it is very easy to make a switch of resources from one site to the other in a very short period of time.
Warm site: A warm site is quite different from a cold site in that it's a location where one have all one's equipment but all the hardware is stored in a separate room. This means that if there is a disaster, people will show up in the facility and start putting things in racks since it is a recovery site that gives enough room. In this case, the most important thing is that one need to have all the recovery data and software so that one can load it on the systems and begin the recovery process.