32 lines
1.4 KiB
Plaintext
32 lines
1.4 KiB
Plaintext
config ZCACHE2
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bool "Dynamic compression of swap pages and clean pagecache pages"
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depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP && !ZCACHE
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select CRYPTO_LZO
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default n
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help
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Zcache2 doubles RAM efficiency while providing a significant
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performance boosts on many workloads. Zcache2 uses
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compression and an in-kernel implementation of transcendent
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memory to store clean page cache pages and swap in RAM,
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providing a noticeable reduction in disk I/O. Zcache2
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is a complete rewrite of the older zcache; it was intended to
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be a merge but that has been blocked due to political and
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technical disagreements. It is intended that they will merge
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again in the future. Until then, zcache2 is a single-node
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version of ramster.
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config RAMSTER
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bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
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depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE2=y
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depends on NET
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# must ensure struct page is 8-byte aligned
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select HAVE_ALIGNED_STRUCT_PAGE if !64_BIT
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default n
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help
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RAMster allows RAM on other machines in a cluster to be utilized
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dynamically and symmetrically instead of swapping to a local swap
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disk, thus improving performance on memory-constrained workloads
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while minimizing total RAM across the cluster. RAMster, like
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zcache2, compresses swap pages into local RAM, but then remotifies
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the compressed pages to another node in the RAMster cluster.
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