Category Archive for: ‘Storage Performance’

VirtuCache Improves Hadoop Performance within VMs at Stanford

Typically Hadoop workloads are run on bare-metal servers. However since Stanford’s School of Medicine was 100% virtualized, and because their security, monitoring & management tools were integrated within VMware, it was easier for them to deploy Hadoop within VMs, instead of provisioning new physical servers. The biggest challenge Stanford faced with Hadoop VMs was low throughput and high latencies for writes to disk. Deploying VirtuCache resulted in write latencies in Hadoop reducing...

VirtuCache Improves the Performance of Equallogic Appliances for VMware VMs and Bare-Metal Linux Servers

By deploying VirtuCache in Dun & Bradstreet's VMware environment, we demonstrated sub 10ms VM latencies for high, write-intensive, random storage IO, which in turn facilitated the P2V of their database servers.

Reducing write latencies in EMC Unity hybrid storage appliance

The biggest drawback of the caching functionality in EMC Unity hybrid arrays is that both the SSD layer (FastCache) and memory layer (System Cache) don't cache small block random writes, so if your workload is write intensive then you might have performance issues even if you have large amounts of system RAM or Fast Cache SSDs in your EMC Unity array.

VirtuCache Host Side Caching versus Storage Controller Cache

Global Foundries is one of the world’s largest semiconductor foundries making chips for AMD, IBM, and Qualcomm. Global Foundries’ IT had recently moved their Business Intelligence applications from physical servers to VMs. Such a migration had resulted in high storage latencies and lower throughput for this application, which meant that the user queries during the daytime and batch jobs during off-hours were taking a lot longer than when the workload was running on bare metal...

Caching from SAN to in-Host SSD to Improve Performance of Call Center Workflow Management

Call Center Workflow Management software is storage IO intensive since it involves ingesting and analyzing large volumes of audio. By caching from slower storage to in-host SSDs/DRAM, VirtuCache improved storage performance considerably thus improving the performance of Verint's Call Center Workflow software running within VMs.

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