Welcome to SAM-QFS Weblog

Welcome to the Sun SAM and QFS Blog! SAM is storage archive manager which manages data (both on disk and tape) with amazing ease and transparency to the user. QFS is a shared file system which scales from 1 to 128 nodes and virtually has no limit to the amount of information managed. I know there is a community of people out there that are already familiar with this software, but I'd like a brief introduction of SAM and QFS for those that are not.

So, what is SAM and QFS? In a nutshell, it provides a complete data management system but consists of two integrated software products SAM (Storage Archive Manager) and QFS (High Performance Shared SAN file system).

The Shared QFS file system is a high-performance, 64-bit Solaris SAN based file system. This file system ensures that data is available at device-rated speeds when requested by one or more users. The Shared QFS file system's inherent scalability allows an organization's storage requirements to grow over time from Terrabytes to Petabytes with virtually no limit to the amount of information that can be managed. In addition, the Shared QFS file system allows you to scale from 1 to 128 compute nodes to let you scale your data sharing with your computational needs. QFS also let's you tune your I/O access to your specific data profile to maximize your read and write performance to disk. Shared QFS is also part of Sun's heterogeneous SAN story and supports linux client nodes in addition to the native Solaris clients. We also support IBM Sanergy clients in a QFS shared configuration.

As I said, SAM is tightly integrated with QFS. The SAM adds the features of a storage archive manager to QFS. A SAM-QFS file system configuration allows data to be archived to and retrieved from local or remote automated tape libraries or disk at device-rated speeds. SAM manages QFS data online, nearline, and offline automatically and in a manner that is transparent to the user or application. Users read and write files to a SAM-QFS file system as though all files were on primary storage. In addition, SAM protects QFS file system data continually, automatically, and unobtrusively. Multiple file copies can be made to many media types and storage tiers in a standard format. This minimizes the requirement for traditional back-up only and provides fast disaster recovery in an effective long-term data storage solution. A SAM-QFS file system configuration is especially suited to data-intensive applications that require a scalable and flexible storage solution, superior data protection, and fast disaster recovery. This solution also includes an integrated volume manager, automated and flexible policy management, GUI-based management tools.

On the whole SAM-QFS solution solves data management needs with ease and reliability and we're just getting better and bigger. Look here for technical discussion around SAM-QFS and it's future development.



Could you please add RSS feed as well ?

Posted by przemol on February 21, 2007 at 05:12 PM CST #

good initiative...hope you'll carry-on Ted.

Posted by selim on February 24, 2007 at 06:08 PM CST #

Our company is looking into using SUN Cluster software with QFS as the clustered file system . We have previously used NFS but are looking for alternatives (due to issues with NFS loopback mounts and Sun cluster software). We tested performance of Sun Cluster filesystem and GFS and ruled both out as options. Performance was much lower than NFS to a point that it was unacceptable. We have not experimented with QFS and I was wondering if you can post some performance related numbers (NFS vs. GFS vs. QFS) Thanks!

Posted by John Hadad on February 26, 2007 at 09:25 AM CST #

Ted, Great overview. Can you talk about the competitive landscape, that is, how does SAM-QFS compare to other clustered file systems such as Veritas?

Posted by Ed Morgan on March 09, 2007 at 06:26 AM CST #

Hi Ted, I added your blog to my bloglines feeds list. Please keep it running. Meantime I need to complain about the follwoing problem: http://napobo3.blogspot.com/2007/03/qfs-and-sam-fs-patches-were-removed.html Thanks, -- Leon

Posted by Leon Koll on March 13, 2007 at 12:13 AM CDT #

Does SAM-QFS support Oracle RMAN backup? I am having problem delete old Oracle backup using Oracle Recover Manager (RMAN) in Solaris 10 env. ORA-19501: read error on file "/archive/backups/oracle/backup_incr_xxxx_32711948_1_20070316.bak", blockno 2049 (blocksize=512) ORA-27063: number of bytes read/written is incorrect SVR4 Error: 5: I/O error Additional information: -1 Additional information: 1048576 ORA-19501: read error on file "/archive/backups/oracle/backup_incr_xxxx_32711948_1_20070316.bak", blockno 4097 (blocksize=512) ORA-27063: number of bytes read/written is incorrect SVR4 Error: 5: I/O error Additional information: -1

Posted by Michael Chang on April 10, 2007 at 11:39 AM CDT #

Great. We often use SAM-FS, QFS and SAM-QFS. But there are still some feature we are missing such as "never stage" for shared QFS in Backup Environments, QFS Clients for Windows and MacOS in movie business. SAM-QFS is a real good solution to save movies with 200-600 MB/s on storage and archive them on tape media, but you have always windows and apple clients in movie business environments for rendering or color correction etc. So, you have to battle with other Shared FS like ADIC StorNext or CXFS, which have no or no good archive system like SAM-FS. Is it very difficult to develope a real QFS Client for Windows and Apple (no SANergy client) ? For small and medium business SAM-FS is too expensive starting with an archive of 500GB-2TB !!! But there are lots of customers who ask for this archive solution.

Posted by Marco Kuehn on May 18, 2007 at 01:55 AM CDT #

Hi Folks,
I have a Oracle 10g RAC, Sun Clusters 3.2 U1, with QFS file systems behind them, which I'd like to get updated to the latest stable versions of SAM QFS (5.2).
It is a two node RAC-Cluster setup running critical production with 15 TB core database on QFS fs.
Main challenge is, we are running with Solaris 10 u5 08/05, which needs up-gradation, as QFS 5.X recommends ver. Solaris Update 6 or later.
My questions are, can we go for the Solaris LIVE UPGRADE option with my current setup to achieve the same ?
What are the complications or challenges we may face with the post Live-Upgrade in RAC/Cluster/QFS environment ?
We do not go for File System 2A version.
Thanks for your response.

Posted by Ramesh Kondeti on December 16, 2010 at 09:57 PM CST #

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