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Kirill Smelkov
wendelin.core
Commits
215394e1
Commit
215394e1
authored
Jul 15, 2019
by
Kirill Smelkov
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wcfs/__init__.py
wcfs/__init__.py
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wcfs/__init__.py
View file @
215394e1
...
...
@@ -48,10 +48,14 @@ from ZODB.utils import u64, p64
from
zodbtools.util
import
ashex
# WCFS represents connection to wcfs server.
# WCFS represents
filesystem-level
connection to wcfs server.
#
# It has to be created with join.
# Only 1 connection is maintained for one file server.
#
# The primary way to access wcfs is to open logical connection viewing on-wcfs
# data as of particular database state, and use that logical connection to
# create base-layer mappings. See .open and Conn for details.
class
WCFS
(
object
):
# .mountpoint path to wcfs mountpoint
# ._fwcfs /.wcfs/zurl opened to keep the server from going away (at least cleanly)
...
...
@@ -61,6 +65,22 @@ class WCFS(object):
# ._proc wcfs process if it was opened by this WCFS | None
pass
# Conn represents logical connection viewing data on wcfs server as of
# particular database state.
#
# It uses /head/bigfile/* and notifications received from /head/watch to
# maintain isolated database view while at the same time sharing most of data
# cache in OS pagecache of /head/bigfile/*.
#
# XXX wc conn <-> zconn
class
Conn
(
object
):
# ._wc WCFS
# .at Tid
pass
# XXX WatchLink
# XXX Watch
"""
# open creates wcfs file handle, which can be mmaped to give data of ZBigFile.
...
...
@@ -121,6 +141,7 @@ def __init__(wc, mountpoint, fwcfs, proc):
wc
.
_njoin
=
1
wc
.
_proc
=
proc
# close must be called to release joined connection after it is no longer needed.
@
func
(
WCFS
)
def
close
(
wc
):
with
_wcmu
:
...
...
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