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Identifier

000356970

http://elocus.lib.uoc.gr

Title

ZBD : using transparent compression at the block level to increase storage space efficiency

Alternative Title

Διαφανής συμπίεση δεδομένων στο δίσκο για την εξοικονόμηση αποθηκευτικού χώρου

Author

Μακατός, Αθανάσιος

Thesis advisor

Μπίλας, Άγγελος

Abstract

In this work we propose a method for transparent compression in the I/O path. We extend the block layer with the ability to compress and decompress data as they flow between the file-system and the disk. Achieving transparent compression requires extensive metadata management for dealing with variable block sizes, dynamic block mapping, block allocation, explicit work scheduling and I/O optimizations to mitigate the impact of additional I/Os and compression overheads. Our results show that employing on-line transparent compression is a viable option for improving effective storage capacity, it can improve I/O performance by reducing I/O traffic and seek distance, and has a negative impact on performance only when single-thread I/O latency is critical.

Language

English

Issue date

2010-02-18

Collection

School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses

Type of Work--Post-graduate theses

Views

536

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