I have dgraph cluster setup using docker in following way :-
Machina A - 1 zero, 3 alphas
Machine B - 3 alphas
Machines are 4 cpu 16gb memory. Here is my alpha configuration (attached for one of the alphas, others have similar config).
lru_mb: 4096
zero: zero:5080
my: alpha1:7080
postings: /home/ubuntu/server1/p
wal: /home/ubuntu/server1/w
expose_trace: true
telemetry: true
max_retries: 3
mutations: allow
normalize_node_limit: 1000
query_edge_limit: 1000
idx: 1
badger.tables: disk
badger.vlog: disk
and zero configuration -
my: zero:5080
replicas: 3
idx: 1
v: 2
expose_trace: true
I bring up the setup and the alphas connect to the zero and the output of /state endpoint is
{
"counter": "31",
"groups": {
"1": {
"members": {
"1": {
"id": "1",
"groupId": 1,
"addr": "ip1:7080",
"leader": true,
"lastUpdate": "1596088454"
},
"2": {
"id": "2",
"groupId": 1,
"addr": "ip1:7081"
},
"3": {
"id": "3",
"groupId": 1,
"addr": "ip1:7082"
}
},
"tablets": {
"device": {
"groupId": 1,
"predicate": "device"
},
"dgraph.graphql.schema": {
"groupId": 1,
"predicate": "dgraph.graphql.schema"
},
"dgraph.type": {
"groupId": 1,
"predicate": "dgraph.type"
},
"entity_type": {
"groupId": 1,
"predicate": "entity_type"
},
"entity_value": {
"groupId": 1,
"predicate": "entity_value"
},
"phone": {
"groupId": 1,
"predicate": "phone"
}
},
"checksum": "10116038444952767405"
},
"2": {
"members": {
"4": {
"id": "4",
"groupId": 2,
"addr": "ip2:7080"
},
"5": {
"id": "5",
"groupId": 2,
"addr": "ip2:7081",
"leader": true,
"lastUpdate": "1596088475"
},
"6": {
"id": "6",
"groupId": 2,
"addr": "ip2:7082"
}
},
"tablets": {
"dgraph.graphql.xid": {
"groupId": 2,
"predicate": "dgraph.graphql.xid"
}
},
"checksum": "4375140596800650063"
}
},
"zeros": {
"1": {
"id": "1",
"addr": "ip1:5080",
"leader": true
}
},
"maxLeaseId": "10000",
"maxTxnTs": "10000",
"cid": "d6fec2d9-89a6-409d-a7b1-8d7871c7247d",
"license": {
"maxNodes": "18446744073709551615",
"expiryTs": "1598680456",
"enabled": true
}
}
The schema I am using is
<entity_type>: string .
<entity_value>: string @index(exact) @count .
<phone>: [uid] @count @reverse .
<device>: [uid] @count @reverse .
No matter how many nodes I insert, I always get zero logs like this -
Groups sorted by size: [{gid:1 size:0} {gid:2 size:0}]
I0730 06:02:10.600360 12 tablet.go:213] size_diff 0
I0730 06:10:10.600219 12 tablet.go:208]
Groups sorted by size: [{gid:1 size:0} {gid:2 size:0}]
I0730 06:10:10.600324 12 tablet.go:213] size_diff 0
I0730 06:18:10.600344 12 tablet.go:208]
Groups sorted by size: [{gid:1 size:0} {gid:2 size:0}]
I0730 06:18:10.600949 12 tablet.go:213] size_diff 0
I0730 06:26:10.600326 12 tablet.go:208]
Groups sorted by size: [{gid:1 size:0} {gid:2 size:0}]
I0730 06:26:10.600380 12 tablet.go:213] size_diff 0
I0730 06:34:10.600285 12 tablet.go:208]
Groups sorted by size: [{gid:1 size:0} {gid:2 size:0}]
I0730 06:34:10.600316 12 tablet.go:213] size_diff 0
The size diff never comes greater than 0, and that’s why I think the tablet movement is not happening. Filed a similar issue here (Dgraph Zero not moving tablets by itself) . What am I doing wrong in this setup.
