Using Latent Semantic Indexing for Data Deduplication. Both 32-bit and 64-bit Windows operating systems are supported. Backup application in particular commonly generate significant portions of duplicate data over time. A related and somewhat synonymous term is single-instance (data) storage. Finally, Deduplication, or dedupe for short, is probably the most talked about data management strategy. The file system will periodically scan new files creating hashes and compare them to hashes of existing files. changing one copy afterwards will not affect other copies. Hard-linking does not help with large files that have only changed in small ways, such as an email database; differences only find redundancies in adjacent versions of a single file (consider a section that was deleted and later added in again, or a logo image included in many documents). Beating the big data blues. Eli the Computer Guy 26,705 views. We noticed that while you have a Veritas Account, you aren't yet registered to manage cases and use chat.
You can use the Deduplication feature with OpenStorage devices on a 64-bit Backup Exec server. In computing, data deduplication is a technique for eliminating duplicate copies of repeating data. Single-instance storage is a simple variant of data deduplication.
The deduplication process is transparent to the users and backup applications. Related titles should be described in Deduplication, while unrelated titles should be moved to Deduplication (disambiguation). Otherwise, performance and stability are negatively affected. Target deduplication is the process of removing duplicates when the data was not generated at that location. The second reason why deduplication is applied to secondary data, is that secondary data tends to have more duplicate data. In primary storage systems, this overhead may impact performance. Description: Data deduplication is technology that allows you to fit more backups on the same physical media, retain backups for longer periods of time, and speed up data recovery. These copies of data are typically not used for actual production operations and as a result are more tolerant of some performance degradation, in exchange for increased efficiency. For example, to calculate the required amount of RAM for 64 TB of data: Veritas recommends the following as minimum disk speeds per individual read, write, or verify operation: 200 MB per second for enterprise-level performance, 32 to 48 TBs of storage: 200 MB per second, 48 to 64 TBs of storage: 250 MB per second. You may need more capability depending on your objectives for writing to and reading from disk. The storage network must have enough bandwidth to meet your throughput objectives. Deduplication software is technology that eliminates redundant information and replaces subsequent iterations of that data with a pointer to the original.
Which technology we cover?1. Once the data has been deduplicated, upon read back of the file, wherever a link is found, the system simply replaces that link with the referenced data chunk. One of the most common forms of data deduplication implementations works by comparing chunks of data to detect duplicates. Learn more. The benefit is that there is no need to wait for the hash calculations and lookup to be completed before storing the data, thereby ensuring that store performance is not degraded. Storage area network (Fibre Channel or iSCSI), direct-attached storage (DAS), or internal disks are supported. While data deduplication may work at a segment or sub-block level, single instance storage works at the object level, eliminating redundant copies of objects such as entire files or e-mail messages.[12]. This generally takes place directly within a file system.
A data reduction software application is installed on a dedicated server without making changes to the physical network . Veritas strongly recommends that you exclude the deduplication disk storage device from all antivirus scans. [13] The hash functions used include standards such as SHA-1, SHA-256 and others. https://en.wikipedia.org/w/index.php?title=Data_deduplication&oldid=960503280, Creative Commons Attribution-ShareAlike License.
By definition, primary storage systems are designed for optimal performance, rather than lowest possible cost. Tamil Meaning of Dupe - Tamil to English Dictionary with Tamil Meanings, Tamil Vocabulary - Searchable Tamil Dictionary Deduplication is implemented in some filesystems such as in ZFS[15] or Write Anywhere File Layout and in different disk arrays models. Computers with disk speeds less than 100 MB per second experience poor performance. Learn more. The reasons for this are two-fold. The storage network must be a dedicated, low latency network with a maximum of 1-millisecond latency per round trip.
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