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Update device-mapper-driver.md (#1716)

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scjane 2017-02-16 17:14:14 +08:00 committed by John Mulhausen
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engine/userguide/storagedriver/device-mapper-driver.md
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@ -685,7 +685,7 @@ There are several other things that impact the performance of the
One final point, data volumes provide the best and most predictable One final point, data volumes provide the best and most predictable
performance. This is because they bypass the storage driver and do not incur performance. This is because they bypass the storage driver and do not incur
any of the potential overheads introduced by thin provisioning and any of the potential overheads introduced by thin provisioning and
copy-on-write. For this reason, you should to place heavy write workloads on copy-on-write. For this reason, you should place heavy write workloads on
data volumes. data volumes.
## Related Information ## Related Information