Revision 517bd2fc
b/snf-pithos-app/conf/pithos.conf.py | ||
---|---|---|
1 |
# -*- coding: utf-8 - |
|
2 |
# |
|
3 |
# Copyright 2013 GRNET S.A. All rights reserved. |
|
4 |
# |
|
5 |
# Redistribution and use in source and binary forms, with or |
|
6 |
# without modification, are permitted provided that the following |
|
7 |
# conditions are met: |
|
8 |
# |
|
9 |
# 1. Redistributions of source code must retain the above |
|
10 |
# copyright notice, this list of conditions and the following |
|
11 |
# disclaimer. |
|
12 |
# |
|
13 |
# 2. Redistributions in binary form must reproduce the above |
|
14 |
# copyright notice, this list of conditions and the following |
|
15 |
# disclaimer in the documentation and/or other materials |
|
16 |
# provided with the distribution. |
|
17 |
# |
|
18 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS |
|
19 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
|
20 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|
21 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR |
|
22 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
|
23 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
|
24 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
|
25 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
|
26 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
|
27 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
|
28 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
|
29 |
# POSSIBILITY OF SUCH DAMAGE. |
|
30 |
# |
|
31 |
# The views and conclusions contained in the software and |
|
32 |
# documentation are those of the authors and should not be |
|
33 |
# interpreted as representing official policies, either expressed |
|
34 |
# or implied, of GRNET S.A. |
|
35 |
|
|
36 |
from pithos.workers import glue |
|
37 |
import pickle |
|
38 |
from svipc import sem_init, sem_take, sem_give |
|
39 |
|
|
40 |
def find_hole(WORKERS, FOLLOW_WORKERS): |
|
41 |
old_key = [] |
|
42 |
old_age = [] |
|
43 |
for key in FOLLOW_WORKERS: |
|
44 |
if key not in WORKERS.keys(): |
|
45 |
old_age.append(FOLLOW_WORKERS[key] ) |
|
46 |
old_key.append( key ) |
|
47 |
break |
|
48 |
if len(old_age) and len(old_key): |
|
49 |
for key in old_key: |
|
50 |
del FOLLOW_WORKERS[key] |
|
51 |
return old_age |
|
52 |
return old_age |
|
53 |
|
|
54 |
def follow_workers(pid, wid, WORKERS): |
|
55 |
hole = None |
|
56 |
try: |
|
57 |
fd = open('/dev/shm/wid','rb') |
|
58 |
f = pickle.load(fd) |
|
59 |
hole = find_hole(WORKERS, f) |
|
60 |
if len(hole) > 0: |
|
61 |
k = {pid: int(hole[0])} |
|
62 |
else: |
|
63 |
k = {pid: wid} |
|
64 |
f.update(k) |
|
65 |
fd.close() |
|
66 |
fd = open('/dev/shm/wid','wb') |
|
67 |
pickle.dump(f, fd) |
|
68 |
fd.close() |
|
69 |
except: |
|
70 |
fd = open('/dev/shm/wid','wb') |
|
71 |
pickle.dump({pid:wid}, fd) |
|
72 |
fd.close() |
|
73 |
return hole |
|
74 |
|
|
75 |
def allocate_wid(pid, wid, WORKERS): |
|
76 |
d = {pid: wid} |
|
77 |
hole = None |
|
78 |
if sem_init(88,nums=1) == 0: |
|
79 |
hole = follow_workers(pid, wid, WORKERS) |
|
80 |
sem_give(88,0) |
|
81 |
else: |
|
82 |
sem_take(88,0) |
|
83 |
hole = follow_workers(pid, wid, WORKERS) |
|
84 |
sem_give(88,0) |
|
85 |
return hole |
|
86 |
|
|
87 |
|
|
88 |
def post_fork(server,worker): |
|
89 |
wid = allocate_wid(worker.pid,worker.worker_id, server.WORKERS) |
|
90 |
if wid: |
|
91 |
glue.WorkerGlue.setmap(worker.pid,wid[0]) |
|
92 |
else: |
|
93 |
glue.WorkerGlue.setmap(worker.pid,worker.worker_id) |
|
94 |
|
Also available in: Unified diff