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Dnia 8 lipca 2018 09:14:06 CEST, Zac Medico <zmedico@g.o> napisał(a): |
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>On 07/07/2018 11:53 PM, Michał Górny wrote: |
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>> Dnia 8 lipca 2018 08:08:31 CEST, Zac Medico <zmedico@g.o> |
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>napisał(a): |
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>>> Please review. |
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>>> |
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>>> Title: Portage rsync hardlink support |
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>>> Author: Zac Medico <zmedico@g.o> |
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>>> Posted: 2018-07-11 |
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>>> Revision: 1 |
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>>> News-Item-Format: 2.0 |
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>>> Display-If-Installed: sys-apps/portage |
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>>> |
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>>> For users of the rsync tree, beginning with sys-apps/portage-2.3.42, |
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>>> the default behavior for sync operations will use hardlinks in order |
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>>> to ensure that a repository remains in a valid state if something |
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>>> goes wrong [1]. For example, if signature verification fails during |
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>a |
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>>> sync operation, the new hardlink behavior will preserve the previous |
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>>> state of the repository. |
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>>> |
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>>> The new behavior may conflict with configurations that restrict the |
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>>> use of hardlinks, such as overlay filesystems. Therefore, users will |
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>>> have to set "sync-allow-hardlinks = no" in repos.conf if they have |
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>>> a configuration that restricts the use of hardlinks, but this should |
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>>> not be very common: |
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>>> |
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>>> [DEFAULT] |
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>>> sync-allow-hardlinks = no |
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>>> |
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>>> [1] https://bugs.gentoo.org/660410 sys-apps/portage: use rsync |
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>>> --link-dest to implement atomic repository updates (and abort if |
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>>> signature verification fails) |
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>> |
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>> Is safe git syncing implemented already? If not, maybe finish it |
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>first and cover both with a single news item. Git is going to be more |
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>efficient here, so people may want to learn they have an alternative. |
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> |
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>Yeah there's already a patch for git sync [1] but I'd rather not make |
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>this news item more complicated than it needs to be. I wouldn't have |
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>bothered with a news item except that I want to give people some |
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>warning |
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>in case they are using overlayfs [2]. I think the efficiency difference |
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>between rsync and git here are pretty negligible for most people. |
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Are you sure about that? That might have been the case so far but this hardlink tree may actually tip the balance. |
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> |
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>[1] https://bugs.gentoo.org/660372 |
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>[2] |
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>https://www.brunsware.de/blog/gentoo/portage-tree-squashfs-overlayfs.html |
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-- |
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Best regards, |
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Michał Górny (by phone) |
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