Memory Standard NVDIMM , which assumes a particular protection of data in the RAM of the power problems, approved relatively recently - in the second half of last year. But NVDIMM modules - this is not yesterday's invention. A number of companies producing memory modules with a battery for a long time.
In recent years, thanks to the rapid development of flash chips production , NVDIMM steel modules equipped with a sufficient volume of NAND-flash, which allowed to release memory strip on the fly with the ability to cache all data passing through the RAM, not only to save them during a power outage. Thereby NVDIMM standard permits two basic configurations: NVDIMM-N and NVDIMM-F. In the first case, the data will be cleared from the RAM to the NAND-flash after power failure alarm and require a short-term emergency power for the implementation of these operations. In the second case NVDIMM module operates essentially as SSD drive and does not lose data when the network failure.
Recently the company introduced the first HPE NVDIMM modules for proprietary servers of several lines ProLiant Gen9. This 8 GB DDR4-2133 modules with 8 GB NAND-flash. Judging by the inscription on the chips, modules, produces Micron company . The price in question- $ 900 per bar. Modules HPE NVDIMM are NVDIMM-N category. In other words, they need an external battery for an emergency up information from DRAM to NAND. For these purposes, used an external 96-watt lithium-ion battery HPE Smart Storage Battery. One such battery supports up to 16 NVDIMM-N modules or up to 128 GB.
Using memory NVDIMM will not only save data during accidents, but also speed up the recovery server operation after an emergency stop, and increase the productivity of database due to faster work with logs (due to caching). Related Products :
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