Hi,
we are using beansdb and beanseye. I found that there are 2 file under conf dir. Which one should I use when stating the server? example.ini or example.yaml? What's the difference between them?Could you tell me the detail of configuration options about the two kinds of configration file, so that I could set the configuration options correctly .

Hi,
I'm sorry to ask you again. I have ask some questions about the yaml file . But there are also some questions about the yaml conf file . About the example.yaml file :

1. I saw that N=3 in the example.yaml file ,so there are 3 beansdb node in the cluster, but why Servers option only set one server(localhost:7900 and 127.0.0.1:7900 are the same server) only?
   2)The bucket in every beansdb which is in cluster have 16 numbers, Why only set '0 1 2' or ' A -1 B'?
   Why not set other buckets in the beansdb which is in the cluster?Could not
2. I have two beansdb and one beanseye(IP is 192.168.1.1) ,I want to let the two beansdb (which ip are 192.168.1.2 and 192.168.1.3 ) in one cluster by the beanseye , and make them backup for each other . Is the following options in the yaml file right?
   Servers :
   192.168.1.2: 7900
   192.168.1.3: 7900
   I don't know how to set the buckets . How to set if I must set the buckets for each beansdb in the cluster ?
3. the yaml file have options :
   threads : 8
   listen : 0.0.0.0
   readonly : false
   what are the options? How to set them ?

At last , thanks for your reply .

Hi, I have know that the beanseye is using yaml config file after your reply , and thanks very much. We will use beanseye and beansdb in our project. So I have to ask you some questions about config options.I need your help . The yaml has some options , could you tell me the detail :

1 .servers option :
servers:

localhost:7900 0 1 2
127.0.0.1:7900 A -1 B 
 I konw that 'localhost:7900' and '127.0.0.1:7900' but what's means about the '0 1 2' and 'A -1 B'?How to set the options?

2 . how to set following options :

threads: 8
n: 3
w: 2
r: 1
buckets: 16
slow: 200
listen: 0.0.0.0
proxies:

localhost:7905 readonly: false

[root@localhost beanseye]# make
go get github.com/douban/goyaml

github.com/douban/goyaml

src/github.com/douban/goyaml/decode.go: 在函数‘_cgo_bec77eaae85a_Cfunc_event_alias’中:
src/github.com/douban/goyaml/decode.go:36: 错误：expected specifier-qualifier-list before ‘<’ token
make: *** [dep] 错误 2

代码里面好像默认直接写死了用16个bucket，bucket的分布是根据key的hash来确定，有办法手动指定bucket分布不？

如果现在有4台beansdb，N=2, W=3。然后其中一台机器挂掉了（这台机器数据全部丢失），如何能恢复这台机器？我知道应该是可以通过其他的机器恢复数据，不知道有没有现成的方法，还是直接把其他所有的数据都同步一份过来？

还有如果现在用了4台beansdb，想再加一台beansdb，现有在使用一致性hash基础上，该如何做？

在beansdb机器数目发生改变的时候，是通过什么方法来保证数据的备份数（即N是配置文件里面设置的数目）？

1. error info :
   eyes@eyes-H55M-S2:~/beanseye$ sudo ./bin/proxy -conf conf/conf.yaml -basepath /home/eyes/beanseye
   panic: runtime error: index out of range

goroutine 19 [running]:
runtime.panic(0x6de3c0, 0xc74117)
/usr/lib/go/src/pkg/runtime/panic.c:266 +0xb6
memcache.(*ManualScheduler).try_reward(0xc2100d5080)
/home/eyes/beanseye/src/memcache/schedule.go:244 +0x6ab
memcache.func·009()
/home/eyes/beanseye/src/memcache/schedule.go:208 +0x33
created by memcache.NewManualScheduler
/home/eyes/beanseye/src/memcache/schedule.go:211 +0x6d0

goroutine 1 [runnable]:
syscall.Syscall(0x2, 0xc2100b42c0, 0x0, 0x0, 0x9, ...)
/usr/lib/go/src/pkg/syscall/asm_linux_amd64.s:18 +0x5
syscall.open(0x754bd0, 0xe, 0x0, 0x0, 0x0, ...)
/usr/lib/go/src/pkg/syscall/zsyscall_linux_amd64.go:16 +0x9c
syscall.Open(0x754bd0, 0xe, 0x0, 0xc200000000, 0x30, ...)
/usr/lib/go/src/pkg/syscall/syscall_linux.go:23 +0x5e
time.readFile(0x754bd0, 0xe, 0x0, 0x0, 0x0, ...)
/usr/lib/go/src/pkg/time/sys_unix.go:23 +0x91
time.loadZoneFile(0x734e20, 0x0, 0x754bd0, 0xe, 0x0, ...)
/usr/lib/go/src/pkg/time/zoneinfo_read.go:206 +0x16d
time.initLocal()
/usr/lib/go/src/pkg/time/zoneinfo_unix.go:59 +0x7f
sync.(_Once).Do(0xc96c28, 0x7ebeb8)
/usr/lib/go/src/pkg/sync/once.go:40 +0x9a
time.(_Location).get(0xc8db40, 0x8)
/usr/lib/go/src/pkg/time/zoneinfo.go:69 +0x60
time.Time.abs(0xecc01372e, 0x1b2a53c1, 0xc8db40, 0x444142)
/usr/lib/go/src/pkg/time/time.go:253 +0xc5
time.Time.date(0xecc01372e, 0x1b2a53c1, 0xc8db40, 0x1, 0x45a4f3, ...)
/usr/lib/go/src/pkg/time/time.go:677 +0x40
time.Time.Date(0xecc01372e, 0x1b2a53c1, 0xc8db40, 0xc2100b4280, 0xc, ...)
/usr/lib/go/src/pkg/time/time.go:293 +0x40
log.(_Logger).formatHeader(0xc21000a230, 0xc21000a260, 0xecc01372e, 0x1b2a53c1, 0xc8db40, ...)
/usr/lib/go/src/pkg/log/log.go:84 +0x1ae
log.(_Logger).Output(0xc21000a230, 0x2, 0xc2100b50c0, 0x1e, 0x0, ...)
/usr/lib/go/src/pkg/log/log.go:148 +0x201
log.Println(0x7f37d3224e98, 0x2, 0x2)
/usr/lib/go/src/pkg/log/log.go:282 +0x69
main.main()
/home/eyes/beanseye/src/proxy/proxy.go:543 +0x1441

goroutine 4 [syscall]:
os/signal.loop()
/usr/lib/go/src/pkg/os/signal/signal_unix.go:21 +0x1e
created by os/signal.init·1
/usr/lib/go/src/pkg/os/signal/signal_unix.go:27 +0x31

goroutine 5 [chan receive]:
cmem.func·001()
/home/eyes/beanseye/src/cmem/cmem.go:15 +0x3d
created by cmem.init·1
/home/eyes/beanseye/src/cmem/cmem.go:18 +0x48

goroutine 6 [syscall]:
runtime.goexit()
/usr/lib/go/src/pkg/runtime/proc.c:1394

goroutine 13 [runnable]:
net.(_netFD).dial(0xc210102000, 0x7f37d33b4bc0, 0x0, 0x7f37d33b4bc0, 0xc2100b0f90, ...)
/usr/lib/go/src/pkg/net/sock_posix.go:98
net.socket(0x74ec80, 0x3, 0x2, 0x1, 0x0, ...)
/usr/lib/go/src/pkg/net/sock_posix.go:91 +0x40b
net.internetSocket(0x74ec80, 0x3, 0x7f37d33b4bc0, 0x0, 0x7f37d33b4bc0, ...)
/usr/lib/go/src/pkg/net/ipsock_posix.go:136 +0x161
net.dialTCP(0x74ec80, 0x3, 0x0, 0xc2100b0f90, 0xecc01372e, ...)
/usr/lib/go/src/pkg/net/tcpsock_posix.go:155 +0xef
net.dialSingle(0x74ec80, 0x3, 0xc21004e620, 0x12, 0x0, ...)
/usr/lib/go/src/pkg/net/dial.go:225 +0x3d8
net.func·015(0xecc01372e, 0x2d08b3e3, 0xc8db40, 0x11e1a300, 0xecc01372e, ...)
/usr/lib/go/src/pkg/net/dial.go:158 +0xde
net.dial(0x74ec80, 0x3, 0x7f37d33b4b58, 0xc2100b0f90, 0x7f37d323a598, ...)
/usr/lib/go/src/pkg/net/fd_unix.go:40 +0x45
net.(_Dialer).Dial(0xc2100f3100, 0x74ec80, 0x3, 0xc21004e620, 0x12, ...)
/usr/lib/go/src/pkg/net/dial.go:165 +0x3e0
net.DialTimeout(0x74ec80, 0x3, 0xc21004e620, 0x12, 0x11e1a300, ...)
/usr/lib/go/src/pkg/net/dial.go:145 +0xaa
memcache.(_Host).createConn(0xc2100f3000, 0x7f37d323a768, 0xc21000b1c0, 0x434e00, 0xca1c80)
/home/eyes/beanseye/src/memcache/host.go:58 +0x1d0
memcache.(_Host).getConn(0xc2100f3000, 0x0, 0x0, 0x0, 0x0)
/home/eyes/beanseye/src/memcache/host.go:73 +0x12d
memcache.(_Host).execute(0xc2100f3000, 0xc2100f30c0, 0x0, 0x0, 0x0)
/home/eyes/beanseye/src/memcache/host.go:92 +0x59
memcache.(_Host).Stat(0xc2100f3000, 0x0, 0x0, 0x0, 0x2, ...)
/home/eyes/beanseye/src/memcache/host.go:197 +0xa1
main.update_stats(0xc2100b5040, 0x2, 0x2, 0x0, 0x0, ...)
/home/eyes/beanseye/src/proxy/proxy.go:185 +0x357
created by main.main
/home/eyes/beanseye/src/proxy/proxy.go:456 +0x1912

goroutine 14 [select]:
net.lookupIPDeadline(0xc210036780, 0x9, 0xecc01372e, 0x2d064ec1, 0xc8db40, ...)
/usr/lib/go/src/pkg/net/lookup.go:83 +0x326
net.resolveInternetAddr(0x74ec80, 0x3, 0xc210036780, 0xe, 0xecc01372e, ...)
/usr/lib/go/src/pkg/net/ipsock.go:285 +0x395
net.resolveAddr(0x742e80, 0x4, 0x74ec80, 0x3, 0xc210036780, ...)
/usr/lib/go/src/pkg/net/dial.go:104 +0x32a
net.(_Dialer).Dial(0xc21004f480, 0x74ec80, 0x3, 0xc210036780, 0xe, ...)
/usr/lib/go/src/pkg/net/dial.go:153 +0xa7
net.DialTimeout(0x74ec80, 0x3, 0xc210036780, 0xe, 0x11e1a300, ...)
/usr/lib/go/src/pkg/net/dial.go:145 +0xaa
memcache.(_Host).createConn(0xc21004f1c0, 0x7f37d12dc768, 0xc2100a7000, 0x434c00, 0x7f37d33b0178)
/home/eyes/beanseye/src/memcache/host.go:58 +0x1d0
memcache.(_Host).getConn(0xc21004f1c0, 0x0, 0x0, 0x0, 0x0)
/home/eyes/beanseye/src/memcache/host.go:73 +0x12d
memcache.(_Host).execute(0xc21004f1c0, 0xc21004f400, 0x0, 0x0, 0x0)
/home/eyes/beanseye/src/memcache/host.go:92 +0x59
memcache.(*Host).Stat(0xc21004f1c0, 0x0, 0x0, 0x0, 0x1, ...)
/home/eyes/beanseye/src/memcache/host.go:197 +0xa1
main.update_stats(0xc210036ea0, 0x1, 0x1, 0x0, 0x0, ...)
/home/eyes/beanseye/src/proxy/proxy.go:185 +0x357
created by main.main
/home/eyes/beanseye/src/proxy/proxy.go:460 +0x19b2

goroutine 15 [runnable]:
net.zoneToInt(0x0, 0x0, 0x10)
/usr/lib/go/src/pkg/net/ipsock.go:309
net.ipToSockaddr(0xa, 0xc96c40, 0x10, 0x10, 0x1ee4, ...)
/usr/lib/go/src/pkg/net/ipsock_posix.go:172 +0x3b0
net.(_TCPAddr).sockaddr(0xc2100ae600, 0xa, 0x0, 0x4ac513, 0xc210100000, ...)
/usr/lib/go/src/pkg/net/tcpsock_posix.go:52 +0x93
net.(_netFD).listenStream(0xc210100000, 0x7f37d33b4bc0, 0xc2100ae600, 0x80, 0x7e67d8, ...)
/usr/lib/go/src/pkg/net/sock_posix.go:143 +0x83
net.socket(0x74ec80, 0x3, 0xa, 0x1, 0x0, ...)
/usr/lib/go/src/pkg/net/sock_posix.go:78 +0x27a
net.internetSocket(0x74ec80, 0x3, 0x7f37d33b4bc0, 0xc2100ae600, 0x0, ...)
/usr/lib/go/src/pkg/net/ipsock_posix.go:136 +0x161
net.ListenTCP(0x74ec80, 0x3, 0xc2100ae600, 0xc2100ae600, 0xc2100b4001, ...)
/usr/lib/go/src/pkg/net/tcpsock_posix.go:293 +0x177
net.Listen(0x74ec80, 0x3, 0xc2100b4080, 0xc, 0x2, ...)
/usr/lib/go/src/pkg/net/dial.go:256 +0x3be
main.func·005()
/home/eyes/beanseye/src/proxy/proxy.go:470 +0x16f
created by main.main
/home/eyes/beanseye/src/proxy/proxy.go:476 +0x1ad9

goroutine 17 [runnable]:
net._Cfunc_CString(0xc210036780, 0x9, 0xc20fff55f8)
net/_obj/_cgo_defun.c:31 +0x2a
net.cgoLookupIPCNAME(0xc210036780, 0x9, 0x0, 0x0, 0x0, ...)
/usr/lib/go/src/pkg/net/cgo_unix.go:94 +0x124
net.cgoLookupIP(0xc210036780, 0x9, 0x0, 0x0, 0x0, ...)
/usr/lib/go/src/pkg/net/cgo_unix.go:148 +0x69
net.lookupIP(0xc210036780, 0x9, 0x0, 0x0, 0x0, ...)
/usr/lib/go/src/pkg/net/lookup_unix.go:64 +0x63
net.func·022(0xc8d400, 0xc2100ab240, 0xc210036780, 0x9)
/usr/lib/go/src/pkg/net/lookup.go:41 +0x2d
net.(*singleflight).Do(0xc8d400, 0xc210036780, 0x9, 0x7f37d02baed0, 0x0, ...)
/usr/lib/go/src/pkg/net/singleflight.go:45 +0x1de
net.lookupIPMerge(0xc210036780, 0x9, 0x0, 0x0, 0x0, ...)
/usr/lib/go/src/pkg/net/lookup.go:42 +0xc0
net.func·023()
/usr/lib/go/src/pkg/net/lookup.go:80 +0x36
created by net.lookupIPDeadline
/usr/lib/go/src/pkg/net/lookup.go:82 +0x239

goroutine 18 [chan receive]:
memcache.(*ManualScheduler).procFeedback(0xc2100d5080)
/home/eyes/beanseye/src/memcache/schedule.go:277 +0x58
created by memcache.NewManualScheduler
/home/eyes/beanseye/src/memcache/schedule.go:205 +0x6a0

2 my config options :

servers:

• 192.168.1.174:7900
• 192.168.1.175:7900
  port: 7905
  webport: 7908
  threads: 3
  n: 2
  w: 2
  r: 1
  buckets: 16
  slow: 200
  listen: 0.0.0.0
  proxies:
• 192.168.20.166:7905
  accesslog: /log/beansproxy/beansproxy.log
  errorlog: /log/beansproxy/beansproxy_error.log
  basepath: /var/lib/beanseye
  readonly: false

go version
go version go1.4 darwin/amd64

panic: runtime error: index out of range
goroutine 18 [running]:
memcache.(*ManualScheduler).try_reward(0xc208084d00)
/Users/kenneth/beanseye/src/memcache/schedule.go:244 +0x905
memcache.func·009()
/Users/kenneth/beanseye/src/memcache/schedule.go:208 +0x34
created by memcache.NewManualScheduler
/Users/kenneth/beanseye/src/memcache/schedule.go:211 +0x9b3

goroutine 1 [runnable]:
main.main()
/Users/kenneth/beanseye/src/proxy/proxy.go:540 +0x1538

goroutine 6 [syscall]:
os/signal.loop()
/usr/local/Cellar/go/1.4/libexec/src/os/signal/signal_unix.go:21 +0x1f
created by os/signal.init·1
/usr/local/Cellar/go/1.4/libexec/src/os/signal/signal_unix.go:27 +0x35

goroutine 7 [chan receive]:
cmem.func·001()
/Users/kenneth/beanseye/src/cmem/cmem.go:15 +0x4a
created by cmem.init·1
/Users/kenneth/beanseye/src/cmem/cmem.go:18 +0x5c

goroutine 14 [runnable]:
main.update_stats(0xc20801f940, 0x2, 0x2, 0x0, 0x0, 0x0, 0xc2080c6390, 0x2, 0x2, 0x1)
/Users/kenneth/beanseye/src/proxy/proxy.go:166 +0x97
created by main.main
/Users/kenneth/beanseye/src/proxy/proxy.go:458 +0x1ee3

goroutine 15 [runnable]:
main.update_stats(0xc20802b160, 0x1, 0x1, 0x0, 0x0, 0x0, 0xc208056330, 0x1, 0x1, 0x0)
/Users/kenneth/beanseye/src/proxy/proxy.go:166
created by main.main
/Users/kenneth/beanseye/src/proxy/proxy.go:462 +0x1fc8

goroutine 16 [runnable]:
main.func·005()
/Users/kenneth/beanseye/src/proxy/proxy.go:471 +0xb7
created by main.main
/Users/kenneth/beanseye/src/proxy/proxy.go:478 +0x21c0

goroutine 17 [runnable]:
memcache.(*ManualScheduler).procFeedback(0xc208084d00)
/Users/kenneth/beanseye/src/memcache/schedule.go:276
created by memcache.NewManualScheduler
/Users/kenneth/beanseye/src/memcache/schedule.go:205 +0x95e

配置：N=3,W=2，32个节点。
现有的算法似乎会导致数据都分布在前三个节点，而后面的节点一点数据都没有，因为在初始化buckets时，每个bucket的节点列表顺序都是一样的。我测试的结果如下图所示，另外，图中除了bucket 12列标题显示warning对应的颜色，其它的bucket都显示为invalid对应的颜色。