A hybrid access model for storage area networks

We present HSAN & a hybrid storage area network, which uses both in-band (like NFS (R. Sandberg et al., 1985)) and out-of-band visualization (like SAN FS (J. Menon et al., 2003)) access models. HSAN uses hybrid servers that can serve as both metadata and NAS servers to intelligently decide the access model per each request, based on the characteristics of requested data. This is in contrast to existing efforts that merely provide concurrent support for both models and do not exploit model appropriateness for requested data. The HSAN hybrid model is implemented using low overhead cache-admission and cache-replacement schemes and aims to improve overall response times for a wide variety of workloads. Preliminary analysis of the hybrid model indicates performance improvements over both models.

[1]  Darrell D. E. Long,et al.  Data management in a distributed file system for storage area networks , 2000 .

[2]  Dennis Shasha,et al.  2Q: A Low Overhead High Performance Buffer Management Replacement Algorithm , 1994, VLDB.

[3]  Robert M. Rees,et al.  IBM Storage Tank - A heterogeneous scalable SAN file system , 2003, IBM Syst. J..

[4]  Sandy Irani,et al.  Cost-Aware WWW Proxy Caching Algorithms , 1997, USENIX Symposium on Internet Technologies and Systems.

[5]  Dan Walsh,et al.  Design and implementation of the Sun network filesystem , 1985, USENIX Conference Proceedings.

[6]  Azer Bestavros,et al.  Accelerating Internet streaming media delivery using network-aware partial caching , 2002, Proceedings 22nd International Conference on Distributed Computing Systems.

[7]  Prashant J. Shenoy,et al.  PTC: Proxies that Transcode and Cache in Heterogeneous Web Client Environments , 2004, World Wide Web.

[8]  H. Apte,et al.  Serverless Network File Systems , 2006 .

[9]  Nimrod Megiddo,et al.  ARC: A Self-Tuning, Low Overhead Replacement Cache , 2003, FAST.

[10]  Garth A. Gibson,et al.  Understanding Customer Dissatisfaction with Underutilized Distributed File Servers (CMU-CS-96-158) , 1996 .

[11]  Ohad Rodeh,et al.  zFS - a scalable distributed file system using object disks , 2003, 20th IEEE/11th NASA Goddard Conference on Mass Storage Systems and Technologies, 2003. (MSST 2003). Proceedings..

[12]  Peter Scheuermann,et al.  WATCHMAN : A Data Warehouse Intelligent Cache Manager , 1996, VLDB.

[13]  Jim Zelenka,et al.  A cost-effective, high-bandwidth storage architecture , 1998, ASPLOS VIII.