Tag Archives: DDR3

Memory for in-memory databases and SAP HANA

High memory loading and protection from power loss

Since in-memory database solutions (IMDB) tend to move data off the hard drive (slow disk access) and onto DRAM main memory (fast but expensive), there is a higher need for memory on the server.

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Would non-volatile DRAM have reduced Amazon outage ?

NVvault non-volatile DDR3 for Romley

UPDATE: 07/04/2012: Amazon took 3 hours to boot servers

Recently we heard about storms knocking out power at Amazon data centers.

The power outage was for 9 minutes – but the time for recovery was much longer.

Would the use of non-volatile DRAM memory modules have reduced the time to get back to a “consistent state” for end-users ?

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Memory options for the IBM System x3650 M4 server – 32GB memory modules

For 32GB memory modules – the problem with 32GB RDIMMs

32GB RDIMM will only be available in 4-rank (4-rank).

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Memory options for the IBM System x3650 M4 server – 16GB memory modules

For 16GB memory modules use at 1 DPC and 2 DPC

If the memory you need is going to require 1 DPC, or 2 DPC, you are better off buying the IBM RDIMMs.

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Memory options for the HP DL360p and DL380p servers – 32GB memory modules

For 32GB memory modules – the problem with 32GB RDIMMs

Currently HP does not list a 32GB RDIMM in the docs (although it may still offer it).

http://h18004.www1.hp.com/products/quickspecs/14225_na/14225_na.html
Overview
HP SmartMemory

The reason is that the 32GB RDIMM will only be available in 4-rank (4-rank).

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Memory options for the HP DL360p and DL380p servers – 16GB memory modules

For 16GB memory modules use at 1 DPC and 2 DPC

If the memory you need is going to require 1 DPC, or 2 DPC, you are better off buying the HP Smart Memory RDIMMs.

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Installing memory on 2-socket servers – memory mathematics

Background – 2-sockets, memory channels and DPC

On a 2-socket server (2 processors on the motherboard), each Romley processor has 4 memory channels (up from 3 of pre-Romley). On each memory channel if you use 3 DPC (3 DIMMs per channel) you have:

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