Following on from base Ubuntu build here I begin to look at Parrallel Programming. Parrallel Programming Each Raspberry Pi is a small unit of compute, one of my goals is to understand how operating many in a cluster. There are various approaches to parallel computational models, message-passing has proven to be an …

Following on from base Ubuntu build here I look at the comparing the storage performance of SD and USB. SD Card Performance Linux FIO tool will be used to measure sequential write performance of a 4GB file: fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=64 …

To achieve good performance for a virtualized workload your Storage Area Network (SAN) should deliver high IOps with a predictable low latency. If you are using a good flash system where IOps (Input/Output Operations Per Second) effectively become an unlimited resource then latency will probably be your limiting …

In a newly deployed Windows Server 2012 HyperV environment with around sixty nodes, running a couple of hundred Windows Server 2012 virtual machines running various applications. We found the EMC VMX storage which underpinned this became massively busy with Write IO at around 3am, the Write IO was mostly coming from …