Overview
FC EJ12 and EJ13 are both the same adapter with different feature codes. FC EJ12 is a full-height adapter
and FC EJ13 is a low-profile adapter. See “CAPI Compression Accelerator Adapter (FC EJ1A and EJ1B;
CCIN 2CF0)” on page 54 for compression accelerator adapters with greater compression acceleration and
CPU load reduction.
The PCIe3 FPGA Compression Adapter is a PCI Express (PCIe) generation 3 (Gen3), x8 adapter. The
adapter can be used in either a x8 or x16 PCIe Gen3 slot in the system. The PCIe3 FPGA Compression
Accelerator Adapter implements the well-defined, open standard DEFLATE compressed data format. This
data format is widely accepted through zlib, gzip, Java and other applications. Within the gzip and zip
file formats, the adapter is the standard for compressed data exchange. The adapter's high compression
bandwidth reduces the latency for a single compression job significantly. Its aggregate throughput allows
the adapter to keep pace with common I/O traffic and offers reduced data for storage and network
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
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Handling high peak throughput of data when software compression is limited
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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.
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Installing the System and Ordered Parts for the 8335-GCA or 8335-GTA
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