hammer(8) rebalance: change default saturation_percentage a few more places
[dragonfly.git] / sbin / hammer / cmd_rebalance.c
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include "hammer.h"
36
37static void rebalance_usage(int exit_code);
38
39/*
3550e0f5 40 * rebalance <filesystem> [saturation_percentage] (default 85%)
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41 */
42void
43hammer_cmd_rebalance(char **av, int ac)
44{
45 struct hammer_ioc_rebalance rebal;
46 const char *filesystem;
47 int fd;
48 int perc;
49
50 if (TimeoutOpt > 0)
51 alarm(TimeoutOpt);
52
53 bzero(&rebal, sizeof(rebal));
54
55 rebal.key_beg.localization = HAMMER_MIN_LOCALIZATION;
56 rebal.key_beg.obj_id = HAMMER_MIN_OBJID;
57 hammer_get_cycle(&rebal.key_beg, NULL);
58
59 rebal.key_end.localization = HAMMER_MAX_LOCALIZATION;
60 rebal.key_end.obj_id = HAMMER_MAX_OBJID;
61
62 if (ac == 0)
63 rebalance_usage(1);
64 filesystem = av[0];
65 if (ac == 1) {
953bfaa2 66 perc = 85;
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67 } else {
68 perc = strtol(av[1], NULL, 0);
69 if (perc < 50 || perc > 100)
70 rebalance_usage(1);
71 }
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72 rebal.saturation = HAMMER_BTREE_INT_ELMS * perc / 100;
73
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74 printf("rebalance start %016jx:%04x\n",
75 (uintmax_t)rebal.key_beg.obj_id,
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76 rebal.key_beg.localization);
77
78 fd = open(filesystem, O_RDONLY);
79 if (fd < 0)
80 err(1, "Unable to open %s", filesystem);
81 RunningIoctl = 1;
82 if (ioctl(fd, HAMMERIOC_REBALANCE, &rebal) < 0) {
83 printf("Rebalance %s failed: %s\n",
84 filesystem, strerror(errno));
85 } else if (rebal.head.flags & HAMMER_IOC_HEAD_INTR) {
a276dc6b 86 printf("Rebalance %s interrupted by timer at %016jx:%04x\n",
797a0b63 87 filesystem,
a276dc6b 88 (uintmax_t)rebal.key_cur.obj_id,
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89 rebal.key_cur.localization);
90 if (CyclePath) {
91 hammer_set_cycle(&rebal.key_cur, 0);
92 }
93 } else {
94 if (CyclePath)
95 hammer_reset_cycle();
96 printf("Rebalance %s succeeded\n", filesystem);
97 }
98 RunningIoctl = 0;
99 close(fd);
100 printf("Rebalance:\n"
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101 " %jd btree nodes scanned\n"
102 " %jd btree nodes deleted\n"
103 " %jd collision retries\n"
104 " %jd btree nodes rebalanced\n",
105 (intmax_t)rebal.stat_ncount,
106 (intmax_t)rebal.stat_deletions,
107 (intmax_t)rebal.stat_collisions,
108 (intmax_t)rebal.stat_nrebal
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109 );
110}
111
112static
113void
114rebalance_usage(int exit_code)
115{
116 fprintf(stderr,
f6532f03 117 "hammer rebalance <filesystem> [saturation_percentage]\n"
3550e0f5 118 "saturation_percentage is 50%%-100%%, default is 85%%.\n");
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119 exit(exit_code);
120}