| hastctl.8 (220520) | hastctl.8 (229778) |
|---|---|
| 1.\" Copyright (c) 2010 The FreeBSD Foundation 2.\" All rights reserved. 3.\" 4.\" This software was developed by Pawel Jakub Dawidek under sponsorship from 5.\" the FreeBSD Foundation. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions --- 11 unchanged lines hidden (view full) --- 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" | 1.\" Copyright (c) 2010 The FreeBSD Foundation 2.\" All rights reserved. 3.\" 4.\" This software was developed by Pawel Jakub Dawidek under sponsorship from 5.\" the FreeBSD Foundation. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions --- 11 unchanged lines hidden (view full) --- 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" |
| 28.\" $FreeBSD: head/sbin/hastctl/hastctl.8 220520 2011-04-10 15:07:54Z trociny $ | 28.\" $FreeBSD: head/sbin/hastctl/hastctl.8 229778 2012-01-07 16:09:33Z uqs $ |
| 29.\" 30.Dd April 10, 2011 31.Dt HASTCTL 8 32.Os 33.Sh NAME 34.Nm hastctl 35.Nd "Highly Available Storage control utility" 36.Sh SYNOPSIS --- 55 unchanged lines hidden (view full) --- 92maintains a map of dirty extents and extent is the smallest region that 93can be marked as dirty. 94If any part of an extent is modified, entire extent will be synchronized 95when nodes connect. 96If extent size is too small, there will be too much disk activity 97related to dirty map updates, which will degrade performance of the 98given resource. 99If extent size is too large, synchronization, even in case of short | 29.\" 30.Dd April 10, 2011 31.Dt HASTCTL 8 32.Os 33.Sh NAME 34.Nm hastctl 35.Nd "Highly Available Storage control utility" 36.Sh SYNOPSIS --- 55 unchanged lines hidden (view full) --- 92maintains a map of dirty extents and extent is the smallest region that 93can be marked as dirty. 94If any part of an extent is modified, entire extent will be synchronized 95when nodes connect. 96If extent size is too small, there will be too much disk activity 97related to dirty map updates, which will degrade performance of the 98given resource. 99If extent size is too large, synchronization, even in case of short |
| 100outage, can take a long time increasing the risk of loosing up-to-date | 100outage, can take a long time increasing the risk of losing up-to-date |
| 101node before synchronization process is completed. 102The default extent size is 103.Va 2MB . 104.It Fl k Ar keepdirty 105Maximum number of dirty extents to keep dirty all the time. 106Most recently used extents are kept dirty to reduce number of metadata 107updates. 108The default number of most recently used extents which will be kept --- 112 unchanged lines hidden --- | 101node before synchronization process is completed. 102The default extent size is 103.Va 2MB . 104.It Fl k Ar keepdirty 105Maximum number of dirty extents to keep dirty all the time. 106Most recently used extents are kept dirty to reduce number of metadata 107updates. 108The default number of most recently used extents which will be kept --- 112 unchanged lines hidden --- |