Data Domain Global Compression Vs Local Compression

It identifies previously stored segments and cannot be turned off.

Data domain global compression vs local compression. Global compression equals deduplication. Compression is a data reduction technology which aims to store a data set using less physical space. Configure emc data domain collection to capture image level compression rates. Although the terminology contains the word compression it is entirely different than the traditional concept of compression which is also provided by ddos under the name.

We have a very typical setup about 40 virtualized windows servers mostly file servers sql servers exchange print server domain controllers etc. In data domain systems ddos we do global compression and local compression to compress user data. Aggregated global and local compression rates for all backup images can be collected for all active data domain server mtrees connected via ddboost to master servers. The last topic to highlight for understanding ddos compression is the characteristics of dedupe which is referred to as global compression in many data domain documents.

Adding compression to the deduped data you further reduce the data size. How much compression dedup are you getting. I have similar config nfs on a ddr 860. Display compression information using system show performance at the commmand prompt type.

Based on the type of data being ingested compression can give no benefit for encrypted or random data or up to 5 10x compression for common log files. Compression ratio lz gzfast gz. Has almost 45 to 55 db vs file ratio and some 45 db files 10 are super compressed prior to hitting the ddr. Local compression compresses segments before writing them to disk.

Compression attempts to reduce the size of a file by removing redundant data within the file. This works by finding small byte patterns common between the deduplicated blocks. Local compression 40 483 781 960 27 777 975 850 1 48x. This utility will show the global and local compression as data is written this output can also be found at the bottom of daily autosupport email 180561.

Emc data domain global compression is the emc data domain trademarked name for global compression local compression and deduplication. Data domain compression de dupe expectations we just got a new dd160 and are starting to integrate it into our backup infrastructure. Today we will introduce global compression and local compression on data domain. By making files smaller less.

Global data deduplication vs. Compression deduplication and encryption are common data protection technologies for managing and optimizing disk storage and it s important to understand the role each one plays in the data center.