IBM S822LC, Installing The System And Ordered Parts

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traffic. Additionally, the adapter has no impact on most I/O traffic and in some cases will have a positive
effect. The adapter also enables good standard compression in cases where software overhead prevents it.
The following are examples of typical applications that can benefit from compression acceleration:
v Store or transmit large amounts of data that average over 100 MB/s
v Expensive storage with high storage bandwidth, where the accelerator’s compression ratio, compared
to fast software compression, yields significant savings
v Applications that need a high average throughput of data compressed
v Handling high peak throughput of data when software compression is limited
v When low latency for individual compression streams is required and it is more difficult to run in
parallel on many CPUs
v When the standard DEFLATE compression format is required for interchange as used in gzip, zlib, zip,
or JAR (Software compression methods such as LZ4 or LZS with lower compression ratios and high
bandwidth on CPUs are not an option in that case)
v Compression or a mix of compression and decompression is the main bottleneck.
Note: Decompression alone can sometimes still be done in software with many cores in parallel. The
adapter supports full speed decompression for all compliant compressed input regardless of whether it
was compressed by hardware or software.
Specifications
Item Description
Adapter FRU number
000NK006 (Designed to comply with RoHS requirement)
I/O bus architecture
PCIe3 x8
Slot requirement
One PCIe x8 or x16 slot
Figure 53. PCIe3 FPGA Compression Accelerator Adapter
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Installing the System and Ordered Parts for the 8335-GCA or 8335-GTA