International Business Machines Corporation

Omer Haklay

Ori Shalev

Jonathan Fischer-Toubol

Nir Milstein

Yosef Shatsky

Asaf Porat-Stoler

Avraham Bab-Dinitz

Methods that can provide distributed data deduplication reference counting are disclosed herein. One method includes generating, by a processor, a secondary reference in response to a determination that a data chunk is a copy of the primary reference in which the primary reference includes a pointer to an existing data chunk stored on a storage device. The method further includes incrementing a secondary reference counter on the primary reference in response to generating the secondary reference. Apparatus and computer program products that can include, perform, and/or implement the methods are also disclosed herein.

Distributed data deduplication reference counting

Delay commands are injected into sequential input/output (I/O) requests and the effects of the injected delay commands are measured for determining whether a storage system handling the sequential input/output (IO) requests is causing a bottleneck, while the processing of sequential I/O requests is delayed for a time period when injecting the delay command.

Self-detecting storage bottleneck while handling sequential I/O operations

Delay commands are injected into sequential input/output (I/O) requests and the effects of the injected delay commands are measured for determining whether a storage system handling the sequential input/output (IO) requests is causing a bottleneck.

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Shoham, Israel

Omer Haklay