56 lines
1.7 KiB
ReStructuredText
56 lines
1.7 KiB
ReStructuredText
POSIX networking for Scylla
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===========================
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**Topic: Planning and setup**
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**Learn: How to configure POSIX networking for Scylla**
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**Audience: Developers, devops, integration testers**
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The Seastar framework used in Scylla can support two networking modes.
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For high-performance production workloads, use the Data Plane
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Development Kit (DPDK) for maximum performance on specific modern
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network hardware.
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For ease of development, you can also use POSIX mode, which works on all
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physical and virtual network devices supported by your operating system.
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Kernel Configuration
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--------------------
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The Linux “transparent hugepages” feature is recommended, but not
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required, in POSIX mode to minimize overhead on memory allocations. The
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value of ``/sys/kernel/mm/transparent_hugepage/enabled`` should be
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``always`` or ``madvise``. See your Linux distribution's documentation
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for instructions on how to enable transparent hugepages.
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Firewall Configuration
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----------------------
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For a single node, the firewall will need to be set up to allow TCP on
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the following :ref:`ports <cqlsh-networking>`.
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Scylla Configuration
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--------------------
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POSIX mode is the default, in ``/etc/sysconfig/scylla-server``. Check
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that ``NETWORK_MODE`` is set to ``posix``.
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::
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# choose following mode: virtio, dpdk, posix
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NETWORK_MODE=posix.
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The ``ETHDRV`` option is ignored in POSIX mode.
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More Information
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----------------
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`Cassandra: configuring firewall port
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access <http://docs.datastax.com/en//cassandra/2.0/cassandra/security/secureFireWall_r.html>`__
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`How to use, monitor, and disable transparent hugepages in Red Hat
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Enterprise Linux 6 <https://access.redhat.com/solutions/46111>`__
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:doc:`Knowledge Base </kb/index>`
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