99 lines
1.9 KiB
ReStructuredText
99 lines
1.9 KiB
ReStructuredText
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==========================
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Customizing CPUSET
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==========================
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CPUSET in the ``/etc/scylla.d/cpuset.conf`` file is automatically configured by running the ``scylla_setup``
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(or ``scylla_cpuset_setup``) script. If you want to customize CPUSET, you must modify both the ``cpuset.conf``
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and ``perftune.yaml`` files.
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Note that the ``scylla-server`` service will generate ``/etc/scylla.d/perftune.yaml`` *only if* the file doesn't exist.
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Examples
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----------
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Here are a few examples of possible configurations. In the examples, ``eth5`` is used as a NIC name and ``/var/lib/scylla`` as a data directory.
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Example 1
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^^^^^^^^^^
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* 16 CPUs system.
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* You want to run ScyllaDB on CPUs 3, 4, 5, and have IRQs handled on the same CPUs, while allowing other apps on the same machine to benefit
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from XFS/RFS/RPS from ``eth5``.
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**cpuset.conf:**
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.. code-block:: none
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CPUSET="--cpuset 3,4,5 "
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**perftune.yaml:**
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.. code-block:: none
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cpu_mask: '0xffff'
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dir:
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- /var/lib/scylla
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irq_cpu_mask: '0x38'
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nic:
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- eth5
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tune:
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- net
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- disks
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Example 2
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^^^^^^^^^^
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* 16 CPUs system.
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* You want to run ScyllaDB on CPUs 3, 4, 5, and have IRQs handled on the same CPUs, and ScyllaDB is going to be the only application
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that will use ``eth5``.
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**cpuset.conf:**
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.. code-block:: none
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CPUSET="--cpuset 3,4,5 "
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**perftune.yaml:**
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.. code-block:: none
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cpu_mask: '0x38'
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dir:
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- /var/lib/scylla
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irq_cpu_mask: '0x38'
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nic:
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- eth5
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tune:
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- net
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- disks
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Example 3
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^^^^^^^^^^
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* 16 CPUs system.
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* You want to run ScyllaDB on CPUs 3, 4, 5, and IRQs handled on CPUs 6,7,8, while allowing other apps on the same machine to benefit
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from XFS/RFS/RPS from ``eth5``.
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**cpuset.conf:**
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.. code-block:: none
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CPUSET="--cpuset 3,4,5 "
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**perftune.yaml:**
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.. code-block:: none
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cpu_mask: '0xffff'
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dir:
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- /var/lib/scylla
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irq_cpu_mask: '0x1c0'
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nic:
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- eth5
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tune:
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- net
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- disks
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