1. NAS Brief and Sub-component
The try of ZFS 彧宏
PAS Lab Summer Workshop 2009
June 30, 2009

2. Outline The NAS The Architecture Research
Public Definition: Cost Down Storage Area Network (SAN)
Definition in the Presentation: Storage over Network[1]
Applications
System Architecture
The Architecture
Research 1.

3. The Characteristics Storage over Network
Minimal-Functionality or Stripped-Down Operating Systems (OS)
NAS serves file-based protocols such as NFS, SMB/CIFS, or AFP
NAS serves block-based (disk-based) protocols such as
iSCSI (SCSI Commands over Network)
FC-channel (Special Host/Device over Fiber Channel)
More Features…

4. The Applications(1/4)

5. Application(2/4)
Virtualization
No downtime
Amazon EC2
XEN
Clouding

6. Application(3/4)
Database Storage

7. Application(4/4)
Data Center

8. Architecture OS – Linux, BSD, Solaris, Darwin (The kernel of Mac OS X)
SMB / CIFS
NFS
AFS
iSCSI
Software RAID
Volume – LVM
File System – Ext3/4/ReiserFS
ZFS
Web Management
FTP
uPnP
Disk Controller Driver
Hardware Platform
SATA/SAS/HW RAIDs
CPU – x86,ARM,MIPS, PowerPC
NIC

9. File System – Ext3/4/ReiserFS
The Research(1/3)
We are interesting in ZFS
Why?
Integrating RAID, Volume and File System
VFS layer is the most important component in NAS
Goal?
Parallelize with Multi-Core, GPU, Cell and DSP
Software RAID
Volume – LVM
File System – Ext3/4/ReiserFS
ZFS

10. Research(2/3) Parallelization
Each data block are applied to the same algorithm

11. Research(3/3) So, how do we start?
Install Solaris on both SPARC and x86 with ZFS, and Get familiar with Dtrace(1 week)
Trace the hot path with Dtrace[2] and identify the parallelizable code in ZFS(1~2weeks)
Get familiar with GPGPU[3](CUDA[4]), CELL[5][6], or Multi-core Programming (SIMD[7]) ( pick one, 1 week)
Try to Parallelize the hot path and parallelizable code(2~4 weeks)
Of course, there are many LOST CHAPTERs, when we try to enhance the ZFS in the try .
Assume I’m an inexperienced project leader
Find out the missing part, and tell me if I don’t take XXX part serious, the project will be failure. 2. 3. 4. 5. 6. 7.

12. Thank you
There are many advanced topic you may extend after summer, and
It might be your master thesis.
Any Question?