Vmware, Inc.

Fei Meng

Li Zhou

Sandeep Madhav Uttamchandani

Deng Liu

Yea-Cheng Wang

Techniques for automatically allocating space in a flash storage-based cache are provided. In one embodiment, a computer system collects I/O trace logs for a plurality of virtual machines or a plurality of virtual disks and determines cache utility models for the plurality of virtual machines or the plurality of virtual disks based on the I/O trace logs. The cache utility model for each virtual machine or each virtual disk defines an expected utility of allocating space in the flash storage-based cache to the virtual machine or the virtual disk over a range of different cache allocation sizes. The computer system then calculates target cache allocation sizes for the plurality of virtual machines or the plurality of virtual disks based on the cache utility models and allocates space in the flash storage-based cache based on the target cache allocation sizes.

Automated space management for server flash cache

Systems and techniques are described for thread cache allocation. A described technique includes monitoring input and output accesses for a plurality of threads executing on a computing device that includes a cache comprising a quantity of memory blocks, determining a respective reuse intensity for each of the threads, determining a respective read ratio for each of the threads, determining a respective quantity of memory blocks for each of the partitions by optimizing a combination of cache utilities, each cache utility being based on the respective reuse intensity, the respective read ratio, and a respective hit ratio for a particular partition, and resizing one or more of the partitions to be equal to the respective quantity of the memory blocks for the partition.

Thread cache allocation

Techniques for performing I/O load balancing are provided. In one embodiment, a computer system can receive an I/O request destined for a storage array, where the computer system is communicatively coupled with the storage array via a plurality of paths, and where the plurality of paths include a set of optimized paths and a set of unoptimized paths. The computer system can further determine whether the I/O request can be transmitted to the storage array via either an optimized path or an unoptimized path, or solely via an optimized path. The computer system can then select a path in the plurality of paths based on the determination and transmit the I/O request to the storage array via the selected path.

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Raleigh, NC, United States of America

Fei Meng