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[Documentation](../README.md#documentation) → Configuration Reference
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-----
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[Читать на русском](config.ru.md)
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# Configuration Reference
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Vitastor configuration consists of:
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- [Configuration parameters (key-value)](#parameter-reference)
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- [Pool configuration](config/pool.en.md)
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- [OSD placement tree configuration](config/pool.en.md#placement-tree)
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- [Separate OSD settings](config/pool.en.md#osd-settings)
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- [Inode configuration](config/inode.en.md) i.e. image metadata like name, size and parent reference
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Configuration parameters can be set in 3 places:
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- Configuration file (`/etc/vitastor/vitastor.conf` or other path)
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- etcd key `/vitastor/config/global`. Most variables can be set there, but etcd
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connection parameters should obviously be set in the configuration file.
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- Command line of Vitastor components: OSD, mon, fio and QEMU options,
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OpenStack/Proxmox/etc configuration. The latter doesn't allow to set all
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variables directly, but it allows to override the configuration file and
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set everything you need inside it.
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In the future, additional configuration methods may be added:
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- OSD superblock which will, by design, contain parameters related to the disk
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layout and to one specific OSD.
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- OSD-specific keys in etcd like `/vitastor/config/osd/<number>`.
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## Parameter Reference
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- [Common](config/common.en.md)
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- [Network](config/network.en.md)
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- [Global Disk Layout](config/layout-cluster.en.md)
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- [OSD Disk Layout](config/layout-osd.en.md)
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- [OSD Runtime Parameters](config/osd.en.md)
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- [Monitor](config/monitor.en.md)
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