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J'ai une configuration très simple consistant en un elasticsearch 0.90.2 s'exécutant dans un système Ubuntu 13.04 64 bits.Taille d'un index sur le système de fichiers dans elasticsearch
En utilisant _status, c'est l'information d'un de mes index:
"edge":{
"index":{
"primary_size":"63.6kb",
"primary_size_in_bytes":65127,
"size":"63.6kb",
"size_in_bytes":65127
},
"translog":{
"operations":0
},
"docs":{
"num_docs":43,
"max_doc":63,
"deleted_docs":20
},
"merges":{
"current":0,
"current_docs":0,
"current_size":"0b",
"current_size_in_bytes":0,
"total":0,
"total_time":"0s",
"total_time_in_millis":0,
"total_docs":0,
"total_size":"0b",
"total_size_in_bytes":0
},
"refresh":{
"total":20,
"total_time":"241ms",
"total_time_in_millis":241
},
"flush":{
"total":20,
"total_time":"47ms",
"total_time_in_millis":47
},
"shards":{
"0":[
{
"routing":{
"state":"STARTED",
"primary":true,
"node":"bn6ndqXtQKGVDg5eWjo78Q",
"relocating_node":null,
"shard":0,
"index":"edge"
},
"state":"STARTED",
"index":{
"size":"9.6kb",
"size_in_bytes":9887
},
"translog":{
"id":1375245630892,
"operations":0
},
"docs":{
"num_docs":8,
"max_doc":12,
"deleted_docs":4
},
"merges":{
"current":0,
"current_docs":0,
"current_size":"0b",
"current_size_in_bytes":0,
"total":0,
"total_time":"0s",
"total_time_in_millis":0,
"total_docs":0,
"total_size":"0b",
"total_size_in_bytes":0
},
"refresh":{
"total":3,
"total_time":"65ms",
"total_time_in_millis":65
},
"flush":{
"total":4,
"total_time":"11ms",
"total_time_in_millis":11
}
}
],
"1":[
{
"routing":{
"state":"STARTED",
"primary":true,
"node":"bn6ndqXtQKGVDg5eWjo78Q",
"relocating_node":null,
"shard":1,
"index":"edge"
},
"state":"STARTED",
"index":{
"size":"9kb",
"size_in_bytes":9284
},
"translog":{
"id":1375245630912,
"operations":0
},
"docs":{
"num_docs":6,
"max_doc":9,
"deleted_docs":3
},
"merges":{
"current":0,
"current_docs":0,
"current_size":"0b",
"current_size_in_bytes":0,
"total":0,
"total_time":"0s",
"total_time_in_millis":0,
"total_docs":0,
"total_size":"0b",
"total_size_in_bytes":0
},
"refresh":{
"total":3,
"total_time":"32ms",
"total_time_in_millis":32
},
"flush":{
"total":4,
"total_time":"7ms",
"total_time_in_millis":7
}
}
],
"2":[
{
"routing":{
"state":"STARTED",
"primary":true,
"node":"bn6ndqXtQKGVDg5eWjo78Q",
"relocating_node":null,
"shard":2,
"index":"edge"
},
"state":"STARTED",
"index":{
"size":"19kb",
"size_in_bytes":19539
},
"translog":{
"id":1375245630990,
"operations":0
},
"docs":{
"num_docs":11,
"max_doc":16,
"deleted_docs":5
},
"merges":{
"current":0,
"current_docs":0,
"current_size":"0b",
"current_size_in_bytes":0,
"total":0,
"total_time":"0s",
"total_time_in_millis":0,
"total_docs":0,
"total_size":"0b",
"total_size_in_bytes":0
},
"refresh":{
"total":6,
"total_time":"74ms",
"total_time_in_millis":74
},
"flush":{
"total":4,
"total_time":"12ms",
"total_time_in_millis":12
}
}
],
"3":[
{
"routing":{
"state":"STARTED",
"primary":true,
"node":"bn6ndqXtQKGVDg5eWjo78Q",
"relocating_node":null,
"shard":3,
"index":"edge"
},
"state":"STARTED",
"index":{
"size":"15.6kb",
"size_in_bytes":16049
},
"translog":{
"id":1375245631046,
"operations":0
},
"docs":{
"num_docs":9,
"max_doc":13,
"deleted_docs":4
},
"merges":{
"current":0,
"current_docs":0,
"current_size":"0b",
"current_size_in_bytes":0,
"total":0,
"total_time":"0s",
"total_time_in_millis":0,
"total_docs":0,
"total_size":"0b",
"total_size_in_bytes":0
},
"refresh":{
"total":5,
"total_time":"43ms",
"total_time_in_millis":43
},
"flush":{
"total":4,
"total_time":"10ms",
"total_time_in_millis":10
}
}
],
"4":[
{
"routing":{
"state":"STARTED",
"primary":true,
"node":"bn6ndqXtQKGVDg5eWjo78Q",
"relocating_node":null,
"shard":4,
"index":"edge"
},
"state":"STARTED",
"index":{
"size":"10.1kb",
"size_in_bytes":10368
},
"translog":{
"id":1375245631130,
"operations":0
},
"docs":{
"num_docs":9,
"max_doc":13,
"deleted_docs":4
},
"merges":{
"current":0,
"current_docs":0,
"current_size":"0b",
"current_size_in_bytes":0,
"total":0,
"total_time":"0s",
"total_time_in_millis":0,
"total_docs":0,
"total_size":"0b",
"total_size_in_bytes":0
},
"refresh":{
"total":3,
"total_time":"27ms",
"total_time_in_millis":27
},
"flush":{
"total":4,
"total_time":"7ms",
"total_time_in_millis":7
}
}
]
}
}
La taille totale de l'indice devrait être 63.6kb de la réponse.
Cependant, si je vérifie /var/lib/elasticsearch/elasticsearch/nodes/0/indices/edge en utilisant nautilus, la taille est signalée comme 153.1kb.
Pourquoi y a-t-il une si grande différence? Comment elasticsearch calcule-t-il la taille?
Je pense que 63.kb est trop petit pour mesurer un résultat correct. Il semble qu'il y ait une différence de 90 kb entre deux valeurs. Je recommande de le mesurer avec un grand nombre de docs (comme 1000,10000,100000 ...) et de vérifier si la différence est constante (~ 90kb) ou augmente. S'il y a plus de questions que d'autres, il se peut que ce ne soit que quelques paramètres de configuration. – shyos