1 / 3

Active Storage

Parallel Filesystem's Clients. Compute Node. Compute Node. Compute Node. Compute Node. Network Interconnect. ASRF. asmaster. ASRF. Processing Component. Processing Component. Data I/O Traffic. Metadata Server. Storage Node 0. Storage Node N-1.

toby
Download Presentation

Active Storage

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Parallel Filesystem's Clients Compute Node Compute Node Compute Node Compute Node ..... Network Interconnect ASRF asmaster ASRF Processing Component Processing Component ..... Data I/O Traffic Metadata Server Storage Node0 Storage NodeN-1 Parallel Filesystem's Components (also clients of the filesystem) Active Storage An Active Storage System • Modern file systems, such as PVFS and Lustre, use several general purpose servers with substantial CPU and memory resources. • Active Storage moves I/O-intensive tasks from the compute nodes to the storage nodes to profit their resources. Main benefits: • Local I/O operations, • Very low network traffic, • Better overall system performance. Active Storage enables scientific applications to exploit underutilized resources of storage nodes for computations involving data located in secondary storage

  2. Network Interconnect ...... ASRF ASRF ASRF ASRF PC PC asmaster Mapper(0, 2) Storage Node0 Storage Node1 Storage NodeN-1 Storage Node2 Metadata Server Data I/O Traffic ...... Header Var. data Striped netCDF file ...... Var. data ...... Var. data ...... Var. data Var. data Striped and netCDF Files • Striped files broadly used for performance. • Many climate applications store data in netCDF files. • Active Storage efficiently deals with both types of files: • Only storage nodes with relevant data run processing components. • Processing components only compute on local chunks. climate application Active Storage efficiently deals with both striped and netCDF files, eliminating > 95% of the network traffic

  3. Processing of netCDF files Experimental Results An Example of an Active Storage Rule <?xml version="1.0"?> <rule> <stdfiles> <stdout>@.out-${NODENAME}</stdout> </stdfiles> <match> <pattern>/lustre/data.*</pattern> </match> <program> <path arch="any">/lustre/processnetcdf.py</path> <arguments>@ ta</arguments> </program> <mapper> <path arch="any">/lustre/netcdfmapper.py</path> <arguments>@ ta ${CHUNKNUM} ${CHUNKSIZE}</arguments> </mapper> </rule> Non-striped output file /lustre/data.37.out-ost43 Striping information of /lustre/data.37 Variable name in the netCDF file /lustre/data.37

More Related