async def getRootInfo(app, root_id):
""" Get extra information the root collection. """
# Gather additional info on the domain
log.debug(f"getRootInfo {root_id}")
if not isSchema2Id(root_id):
log.info(
f"no dataset details not available for schema v1 id: {root_id} returning null results"
)
return None
s3_key = getS3Key(root_id)
parts = s3_key.split('/')
# dset_key is in the format db/<root>/d/<dset>/.dataset.json
# get the key for the root info object as: db/<root>/.info.json
if len(parts) != 3:
log.error(f"Unexpected s3key format: {s3_key}")
return None
info_key = f"db/{parts[1]}/.info.json"
try:
info_json = await getS3JSONObj(app, info_key)
except HTTPNotFound:
log.warn(f"info.json not found for key: {info_key}")
return None
return info_json
async def check_metadata_obj(app, obj_id):
""" Return False is obj does not exist
"""
if not isValidDomain(obj_id) and not isValidUuid(obj_id):
msg = "Invalid obj id: {}".format(obj_id)
log.error(msg)
raise HTTPInternalServerError()
try:
validateInPartition(app, obj_id)
except KeyError:
log.error("Domain not in partition")
raise HTTPInternalServerError()
deleted_ids = app['deleted_ids']
if obj_id in deleted_ids:
msg = "{} has been deleted".format(obj_id)
log.info(msg)
return False
meta_cache = app['meta_cache']
if obj_id in meta_cache:
found = True
else:
# Not in chache, check s3 obj exists
s3_key = getS3Key(obj_id)
log.debug("check_metadata_obj({})".format(s3_key))
# does key exist?
found = await isS3Obj(app, s3_key)
return found
async def check_metadata_obj(app, obj_id, bucket=None):
""" Return False is obj does not exist
"""
validateObjId(obj_id, bucket)
if isValidDomain(obj_id):
bucket = getBucketForDomain(obj_id)
try:
validateInPartition(app, obj_id)
except KeyError:
log.error("Domain not in partition")
raise HTTPInternalServerError()
deleted_ids = app['deleted_ids']
if obj_id in deleted_ids:
msg = f"{obj_id} has been deleted"
log.info(msg)
return False
meta_cache = app['meta_cache']
if obj_id in meta_cache:
found = True
else:
# Not in chache, check s3 obj exists
s3_key = getS3Key(obj_id)
log.debug(f"check_metadata_obj({s3_key})")
# does key exist?
found = await isS3Obj(app, s3_key, bucket=bucket)
return found
async def removeKeys(app, objid):
# iterate through all s3 keys under the given root or dataset id and delete them
#
# Note: not re-entrant! Only one scanRoot an be run at a time per app.
log.debug(f"removeKeys: {objid}")
if not isSchema2Id(objid):
log.warn("ignoring non-schema2 id")
raise KeyError("Invalid key")
s3key = getS3Key(objid)
log.debug(f"got s3key: {s3key}")
expected_suffixes = (".dataset.json", ".group.json")
s3prefix = None
for suffix in expected_suffixes:
if s3key.endswith(suffix):
s3prefix = s3key[:-len(suffix)]
if not s3prefix:
log.error("unexpected s3key for delete_set")
raise KeyError("unexpected key suffix")
log.info(f"delete for {objid} searching for s3prefix: {s3prefix}")
if app["objDelete_prefix"]:
log.error("objDelete_prefix is already set - impropere use of non-reentrant call?")
# just continue and reset
app["objDelete_prefix"] = s3prefix
try:
await getStorKeys(app, prefix=s3prefix, include_stats=False, callback=objDeleteCallback)
except ClientError as ce:
log.error(f"getS3Keys faiiled: {ce}")
# reset the prefix
app["objDelete_prefix"] = None
async def DELETE_Chunk(request):
"""HTTP DELETE method for /chunks/
Note: clients (i.e. SN nodes) don't directly delete chunks. This method should
only be called by the AN node.
"""
log.request(request)
app = request.app
params = request.rel_url.query
chunk_id = request.match_info.get('id')
if not chunk_id:
msg = "Missing chunk id"
log.error(msg)
raise HTTPBadRequest(reason=msg)
log.info(f"DELETE chunk: {chunk_id}")
if not isValidUuid(chunk_id, "Chunk"):
msg = f"Invalid chunk id: {chunk_id}"
log.warn(msg)
raise HTTPBadRequest(reason=msg)
if "bucket" in params:
bucket = params["bucket"]
else:
bucket = None
validateInPartition(app, chunk_id)
chunk_cache = app['chunk_cache']
s3key = getS3Key(chunk_id)
log.debug(f"DELETE_Chunk s3_key: {s3key}")
if chunk_id in chunk_cache:
del chunk_cache[chunk_id]
deflate_map = app["deflate_map"]
shuffle_map = app["shuffle_map"]
dset_id = getDatasetId(chunk_id)
if dset_id in deflate_map:
# The only reason chunks are ever deleted is if the dataset is being deleted,
# so it should be safe to remove this entry now
log.info(f"Removing deflate_map entry for {dset_id}")
del deflate_map[dset_id]
if dset_id in shuffle_map:
log.info(f"Removing shuffle_map entry for {dset_id}")
del shuffle_map[dset_id]
if await isStorObj(app, s3key, bucket=bucket):
await deleteStorObj(app, s3key, bucket=bucket)
else:
log.info(
f"delete_metadata_obj - key {s3key} not found (never written)?")
resp_json = {}
resp = json_response(resp_json)
log.response(request, resp=resp)
return resp
async def delete_metadata_obj(app,
obj_id,
notify=True,
root_id=None,
bucket=None):
""" Delete the given object """
meta_cache = app['meta_cache']
dirty_ids = app["dirty_ids"]
log.info(f"delete_meta_data_obj: {obj_id} notify: {notify}")
validateObjId(obj_id, bucket)
if isValidDomain(obj_id):
bucket = getBucketForDomain(obj_id)
try:
validateInPartition(app, obj_id)
except KeyError:
log.error(f"obj: {obj_id} not in partition")
raise HTTPInternalServerError()
deleted_ids = app['deleted_ids']
if obj_id in deleted_ids:
log.warn(f"{obj_id} has already been deleted")
else:
log.debug(f"adding {obj_id} to deleted ids")
deleted_ids.add(obj_id)
if obj_id in meta_cache:
log.debug(f"removing {obj_id} from meta_cache")
del meta_cache[obj_id]
if obj_id in dirty_ids:
log.debug(f"removing dirty_ids for: {obj_id}")
del dirty_ids[obj_id]
# remove from S3 (if present)
s3key = getS3Key(obj_id)
if await isS3Obj(app, s3key, bucket=bucket):
await deleteS3Obj(app, s3key, bucket=bucket)
else:
log.info(
f"delete_metadata_obj - key {s3key} not found (never written)?")
if isValidUuid(obj_id) and isSchema2Id(obj_id):
if isRootObjId(obj_id):
# add to gc ids so sub-objects will be deleted
gc_ids = app["gc_ids"]
log.info(f"adding root id: {obj_id} for GC cleanup")
gc_ids.add(obj_id)
elif notify:
root_id = getRootObjId(obj_id)
await notify_root(app, root_id, bucket=bucket)
# no notify for domain deletes since the root group is being deleted
log.debug(f"delete_metadata_obj for {obj_id} done")
async def scanRoot(app, rootid, update=False, bucket=None):
# iterate through all s3 keys under the given root.
# Return dict with stats for the root.
#
# Note: not re-entrant! Only one scanRoot an be run at a time per app.
log.info(f"scanRoot for rootid: {rootid} bucket: {bucket}")
if not isValidUuid(rootid):
raise ValueError("Invalid root id")
if not isSchema2Id(rootid):
log.warn(f"no tabulation for schema v1 id: {rootid} returning null results")
return {}
if not bucket:
bucket = config.get("bucket_name")
if not bucket:
raise ValueError(f"no bucket defined for scan of {rootid}")
root_key = getS3Key(rootid)
if not root_key.endswith("/.group.json"):
raise ValueError("unexpected root key")
root_prefix = root_key[:-(len(".group.json"))]
log.debug(f"scanRoot - using prefix: {root_prefix}")
results = {}
results["lastModified"] = 0
results["num_groups"] = 0
results["num_datatypes"] = 0
results["datasets"] = {} # since we need per dataset info
results["num_chunks"] = 0
results["allocated_bytes"] = 0
results["metadata_bytes"] = 0
results["scan_start"] = time.time()
app["scanRoot_results"] = results
await getStorKeys(app, prefix=root_prefix, include_stats=True, bucket=bucket, callback=scanRootCallback)
log.info(f"scan complete for rootid: {rootid}")
results["scan_complete"] = time.time()
if update:
# write .info object back to S3
info_key = root_prefix + ".info.json"
log.info(f"updating info key: {info_key}")
await putStorJSONObj(app, info_key, results, bucket=bucket)
return results
async def printS3Obj(app, obj_id):
try:
s3_key = getS3Key(obj_id)
obj_exists = await isS3Obj(app, s3_key)
if not obj_exists:
print("s3 key: {} not found".format(s3_key))
return
json_obj = await getS3JSONObj(app, s3_key)
print("s3key {}:".format(s3_key))
print(json.dumps(json_obj, sort_keys=True, indent=4))
except ValueError as ve:
print("Got ValueError exception: {}".format(str(ve)))
except ClientOSError as coe:
print("Got S3 error: {}".format(str(coe)))
async def printS3Obj(app, obj_id):
try:
s3_key = getS3Key(obj_id)
obj_exists = await isStorObj(app, s3_key)
if not obj_exists:
print(f"key: {s3_key} not found")
return
json_obj = await getStorJSONObj(app, s3_key)
print(f"s3key {s3_key}:")
print(json.dumps(json_obj, sort_keys=True, indent=4))
except ValueError as ve:
print(f"Got ValueError exception: {ve}")
except ClientOSError as coe:
print(f"Got error: {coe}")
await releaseStorageClient(app)
async def createDomain(app, domain, domain_json):
try:
s3_key = getS3Key(domain)
domain_exists = await isS3Obj(app, s3_key)
if domain_exists:
raise ValueError("Domain already exists")
parent_domain = getParentDomain(domain)
if parent_domain is None:
raise ValueError("Domain must have a parent")
log.info("writing domain")
await putS3JSONObj(app, s3_key, domain_json)
print("domain created! s3_key: {} domain_json: {}".format(s3_key, domain_json))
except ValueError as ve:
print("Got ValueError exception: {}".format(str(ve)))
except ClientOSError as coe:
print("Got S3 error: {}".format(str(coe)))
async def DELETE_Chunk(request):
"""HTTP DELETE method for /chunks/
Note: clients (i.e. SN nodes) don't directly delete chunks. This method should
only be called by the AN node.
"""
log.request(request)
app = request.app
chunk_id = request.match_info.get('id')
if not chunk_id:
msg = "Missing chunk id"
log.error(msg)
raise HTTPBadRequest(reason=msg)
log.info("DELETE chunk: {}".format(chunk_id))
if not isValidUuid(chunk_id, "Chunk"):
msg = "Invalid chunk id: {}".format(chunk_id)
log.warn(msg)
raise HTTPBadRequest(reason=msg)
validateInPartition(app, chunk_id)
chunk_cache = app['chunk_cache']
s3_key = getS3Key(chunk_id)
log.debug("DELETE_Chunk s3_key: {}".format(s3_key))
if chunk_id in chunk_cache:
del chunk_cache[chunk_id]
deflate_map = app["deflate_map"]
dset_id = getDatasetId(chunk_id)
if dset_id in deflate_map:
# The only reason chunks are ever deleted is if the dataset is being deleted,
# so it should be save to remove this entry now
log.info("Removing deflate_map entry for {}".format(dset_id))
del deflate_map[dset_id]
resp_json = { }
resp = json_response(resp_json)
log.response(request, resp=resp)
return resp
async def s3sync(app):
""" Periodic method that writes dirty objects in the metadata cache to S3"""
MAX_PENDING_WRITE_REQUESTS = 20
dirty_ids = app["dirty_ids"]
pending_s3_write = app["pending_s3_write"]
pending_s3_write_tasks = app["pending_s3_write_tasks"]
s3_sync_interval = config.get("s3_sync_interval")
dirty_count = len(dirty_ids)
if not dirty_count:
log.info("s3sync nothing to update")
return 0
log.info(
f"s3sync update - dirtyid count: {dirty_count}, active write tasks: {len(pending_s3_write_tasks)}/{MAX_PENDING_WRITE_REQUESTS}"
)
log.debug(f"s3sync dirty_ids: {dirty_ids}")
log.debug(f"sesync pending write s3keys: {list(pending_s3_write.keys())}")
log.debug(f"s3sync write tasks: {list(pending_s3_write_tasks.keys())}")
def callback(future):
try:
obj_id = future.result() # returns a objid
log.info(f"write_s3_obj callback result: {obj_id}")
except HTTPInternalServerError as hse:
log.error(f"write_s3_obj callback got 500: {hse}")
except Exception as e:
log.error(
f"write_s3_obj callback unexpected exception {type(e)}: {e}")
update_count = 0
s3sync_start = time.time()
log.info(f"s3sync - processing {len(dirty_ids)} dirty_ids")
for obj_id in dirty_ids:
item = dirty_ids[obj_id]
log.debug(f"got item: {item} for obj_id: {obj_id}")
bucket = item[1]
if not bucket:
if "bucket_name" in app and app["bucket_name"]:
bucket = app["bucket_name"]
else:
log.error(
f"can not determine bucket for s3sync obj_id: {obj_id}")
continue
s3key = getS3Key(obj_id)
log.debug(
f"s3sync dirty id: {obj_id}, s3key: {s3key} bucket: {bucket}")
create_task = True
if s3key in pending_s3_write:
log.debug(
f"key {s3key} has been pending for {s3sync_start - pending_s3_write[s3key]}"
)
if s3sync_start - pending_s3_write[s3key] > s3_sync_interval * 2:
log.warn(
f"obj {obj_id} has been in pending_s3_write for {s3sync_start - pending_s3_write[s3key]} seconds, restarting"
)
del pending_s3_write[s3key]
if obj_id not in pending_s3_write_tasks:
log.error(f"Expected to find write task for {obj_id}")
else:
task = pending_s3_write_tasks[obj_id]
task.cancel()
del pending_s3_write_tasks[obj_id]
else:
log.debug(f"key {s3key} has a pending write task")
create_task = False
if obj_id not in pending_s3_write_tasks:
log.error(
f"expected to find {obj_id} in pending_s3_write_tasks")
if create_task:
if len(pending_s3_write_tasks) < MAX_PENDING_WRITE_REQUESTS:
# create a task to write this object
log.debug(f"s3sync - ensure future for {obj_id}")
task = asyncio.ensure_future(
write_s3_obj(app, obj_id, bucket=bucket))
task.add_done_callback(callback)
pending_s3_write_tasks[obj_id] = task
update_count += 1
else:
log.debug(
f"s3sync - too many pending tasks, not creating task for: {obj_id} now"
)
# notify root of obj updates
notify_ids = app["root_notify_ids"]
if len(notify_ids) > 0:
log.info(f"Notifying for {len(notify_ids)} S3 Updates")
# create a set since we are not allowed to change
root_ids = set()
for root_id in notify_ids:
root_ids.add(root_id)
for root_id in root_ids:
bucket = notify_ids[root_id]
await notify_root(app, root_id, bucket=bucket)
del notify_ids[root_id]
log.info("root notify complete")
# return number of objects written
return update_count
async def write_s3_obj(app, obj_id, bucket=None):
""" writes the given object to s3 """
s3key = getS3Key(obj_id)
log.info(
f"write_s3_obj for obj_id: {obj_id} / s3_key: {s3key} bucket: {bucket}"
)
pending_s3_write = app["pending_s3_write"]
pending_s3_write_tasks = app["pending_s3_write_tasks"]
dirty_ids = app["dirty_ids"]
chunk_cache = app['chunk_cache']
meta_cache = app['meta_cache']
deflate_map = app['deflate_map']
shuffle_map = app['shuffle_map']
notify_objs = app["root_notify_ids"]
deleted_ids = app['deleted_ids']
success = False
if isValidDomain(obj_id):
domain_bucket = getBucketForDomain(obj_id)
if bucket and bucket != domain_bucket:
log.error(
f"expected bucket for domain: {obj_id} to match what wsas passed to write_s3_obj"
)
else:
bucket = domain_bucket
if s3key in pending_s3_write:
msg = f"write_s3_key - not expected for key {s3key} to be in pending_s3_write map"
log.error(msg)
raise KeyError(msg)
if obj_id not in pending_s3_write_tasks:
# don't allow reentrant write
log.debug(f"write_s3_obj for {obj_id} not s3sync task")
if obj_id in deleted_ids and isValidUuid(obj_id):
# if this objid has been deleted (and its unique since this is not a domain id)
# cancel any pending task and return
log.warn(f"Canceling write for {obj_id} since it has been deleted")
if obj_id in pending_s3_write_tasks:
log.info(f"removing pending s3 write task for {obj_id}")
task = pending_s3_write_tasks[obj_id]
task.cancel()
del pending_s3_write_tasks[obj_id]
return None
now = time.time()
last_update_time = now
if obj_id in dirty_ids:
last_update_time = dirty_ids[obj_id][
0] # timestamp is first element of two-tuple
if last_update_time > now:
msg = f"last_update time {last_update_time} is in the future for obj_id: {obj_id}"
log.error(msg)
raise ValueError(msg)
pending_s3_write[s3key] = now
# do the following in the try block so we can always remove the pending_s3_write at the end
try:
if isValidChunkId(obj_id):
if obj_id not in chunk_cache:
log.error(f"expected to find obj_id: {obj_id} in chunk cache")
raise KeyError(f"{obj_id} not found in chunk cache")
if not chunk_cache.isDirty(obj_id):
log.error(f"expected chunk cache obj {obj_id} to be dirty")
raise ValueError("bad dirty state for obj")
chunk_arr = chunk_cache[obj_id]
chunk_bytes = arrayToBytes(chunk_arr)
dset_id = getDatasetId(obj_id)
deflate_level = None
shuffle = 0
if dset_id in shuffle_map:
shuffle = shuffle_map[dset_id]
if dset_id in deflate_map:
deflate_level = deflate_map[dset_id]
log.debug(
f"got deflate_level: {deflate_level} for dset: {dset_id}")
if dset_id in shuffle_map:
shuffle = shuffle_map[dset_id]
log.debug(f"got shuffle size: {shuffle} for dset: {dset_id}")
await putS3Bytes(app,
s3key,
chunk_bytes,
shuffle=shuffle,
deflate_level=deflate_level,
bucket=bucket)
success = True
# if chunk has been evicted from cache something has gone wrong
if obj_id not in chunk_cache:
msg = f"expected to find {obj_id} in chunk_cache"
log.error(msg)
elif obj_id in dirty_ids and dirty_ids[obj_id][
0] > last_update_time:
log.info(
f"write_s3_obj {obj_id} got updated while s3 write was in progress"
)
else:
# no new write, can clear dirty
chunk_cache.clearDirty(obj_id) # allow eviction from cache
log.debug(
"putS3Bytes Chunk cache utilization: {} per, dirty_count: {}"
.format(chunk_cache.cacheUtilizationPercent,
chunk_cache.dirtyCount))
else:
# meta data update
# check for object in meta cache
if obj_id not in meta_cache:
log.error(f"expected to find obj_id: {obj_id} in meta cache")
raise KeyError(f"{obj_id} not found in meta cache")
if not meta_cache.isDirty(obj_id):
log.error(f"expected meta cache obj {obj_id} to be dirty")
raise ValueError("bad dirty state for obj")
obj_json = meta_cache[obj_id]
await putS3JSONObj(app, s3key, obj_json, bucket=bucket)
success = True
# should still be in meta_cache...
if obj_id in deleted_ids:
log.info(
f"obj {obj_id} has been deleted while write was in progress"
)
elif obj_id not in meta_cache:
msg = f"expected to find {obj_id} in meta_cache"
log.error(msg)
elif obj_id in dirty_ids and dirty_ids[obj_id][
0] > last_update_time:
log.info(
f"write_s3_obj {obj_id} got updated while s3 write was in progress"
)
else:
meta_cache.clearDirty(obj_id) # allow eviction from cache
finally:
# clear pending_s3_write item
log.debug(f"write_s3_obj finally block, success={success}")
if s3key not in pending_s3_write:
msg = f"write s3 obj: Expected to find {s3key} in pending_s3_write map"
log.error(msg)
else:
if pending_s3_write[s3key] != now:
msg = f"pending_s3_write timestamp got updated unexpectedly for {s3key}"
log.error(msg)
del pending_s3_write[s3key]
# clear task
if obj_id not in pending_s3_write_tasks:
log.debug(f"no pending s3 write task for {obj_id}")
else:
log.debug(f"removing pending s3 write task for {obj_id}")
del pending_s3_write_tasks[obj_id]
# clear dirty flag
if obj_id in dirty_ids and dirty_ids[obj_id][0] == last_update_time:
log.debug(f"clearing dirty flag for {obj_id}")
del dirty_ids[obj_id]
# add to map so that root can be notified about changed objects
if isValidUuid(obj_id) and isSchema2Id(obj_id):
root_id = getRootObjId(obj_id)
notify_objs[root_id] = bucket
# calculate time to do the write
elapsed_time = time.time() - now
log.info(f"s3 write for {s3key} took {elapsed_time:.3f}s")
return obj_id
async def get_metadata_obj(app, obj_id, bucket=None):
""" Get object from metadata cache (if present).
Otherwise fetch from S3 and add to cache
"""
log.info(f"get_metadata_obj: {obj_id} bucket: {bucket}")
validateObjId(obj_id, bucket) # throws internal server error if invalid
if isValidDomain(obj_id):
bucket = getBucketForDomain(obj_id)
"""
try:
validateInPartition(app, obj_id)
except KeyError:
log.error("Domain not in partition")
raise HTTPInternalServerError()
"""
deleted_ids = app['deleted_ids']
if obj_id in deleted_ids:
msg = f"{obj_id} has been deleted"
log.warn(msg)
raise HTTPGone()
meta_cache = app['meta_cache']
obj_json = None
if obj_id in meta_cache:
log.debug(f"{obj_id} found in meta cache")
obj_json = meta_cache[obj_id]
else:
s3_key = getS3Key(obj_id)
pending_s3_read = app["pending_s3_read"]
if obj_id in pending_s3_read:
# already a read in progress, wait for it to complete
read_start_time = pending_s3_read[obj_id]
log.info(
f"s3 read request for {s3_key} was requested at: {read_start_time}"
)
while time.time() - read_start_time < 2.0:
log.debug("waiting for pending s3 read, sleeping")
await asyncio.sleep(1) # sleep for sub-second?
if obj_id in meta_cache:
log.info(f"object {obj_id} has arrived!")
obj_json = meta_cache[obj_id]
break
if not obj_json:
log.warn(
f"s3 read for object {s3_key} timed-out, initiaiting a new read"
)
# invoke S3 read unless the object has just come in from pending read
if not obj_json:
log.debug(f"getS3JSONObj({s3_key}, bucket={bucket})")
if obj_id not in pending_s3_read:
pending_s3_read[obj_id] = time.time()
# read S3 object as JSON
obj_json = await getS3JSONObj(app, s3_key, bucket=bucket)
if obj_id in pending_s3_read:
# read complete - remove from pending map
elapsed_time = time.time() - pending_s3_read[obj_id]
log.info(f"s3 read for {s3_key} took {elapsed_time}")
del pending_s3_read[obj_id]
meta_cache[obj_id] = obj_json # add to cache
return obj_json
async def delete_metadata_obj(app, obj_id, notify=True, root_id=None):
""" Delete the given object """
meta_cache = app['meta_cache']
dirty_ids = app["dirty_ids"]
log.info("delete_meta_data_obj: {} notify: {}".format(obj_id, notify))
if not isValidDomain(obj_id) and not isValidUuid(obj_id):
msg = "Invalid obj id: {}".format(obj_id)
log.error(msg)
raise HTTPInternalServerError()
try:
validateInPartition(app, obj_id)
except KeyError:
log.error(f"obj: {obj_id} not in partition")
raise HTTPInternalServerError()
deleted_ids = app['deleted_ids']
if obj_id in deleted_ids:
log.warn("{} has already been deleted".format(obj_id))
else:
deleted_ids.add(obj_id)
if obj_id in meta_cache:
log.debug(f"removing {obj_id} from meta_cache")
del meta_cache[obj_id]
if obj_id in dirty_ids:
del dirty_ids[obj_id]
# remove from S3 (if present)
s3key = getS3Key(obj_id)
if await isS3Obj(app, s3key):
await deleteS3Obj(app, s3key)
else:
log.info(
f"delete_metadata_obj - key {s3key} not found (never written)?")
if notify:
an_url = getAsyncNodeUrl(app)
if obj_id.startswith("/"):
# domain delete
req = an_url + "/domain"
params = {"domain": obj_id}
try:
log.info("ASync DELETE notify: {} params: {}".format(
req, params))
await http_delete(app, req, params=params)
except ClientError as ce:
log.error(f"got error notifying async node: {ce}")
except HTTPInternalServerError as hse:
log.error(f"got HTTPInternalServerError: {hse}")
else:
req = an_url + "/object/" + obj_id
try:
log.info(f"ASync DELETE notify: {req}")
await http_delete(app, req)
except ClientError as ce:
log.error(f"got ClientError notifying async node: {ce}")
except HTTPInternalServerError as ise:
log.error(
f"got HTTPInternalServerError notifying async node: {ise}")
log.debug(f"delete_metadata_obj for {obj_id} done")
async def getChunk(app, chunk_id, dset_json, s3path=None, s3offset=0, s3size=0, chunk_init=False):
# if the chunk cache has too many dirty items, wait till items get flushed to S3
MAX_WAIT_TIME = 10.0 # TBD - make this a config
chunk_cache = app['chunk_cache']
if chunk_init and s3offset > 0:
log.error(f"unable to initiale chunk {chunk_id} for reference layouts ")
raise HTTPInternalServerError()
log.debug(f"getChunk cache utilization: {chunk_cache.cacheUtilizationPercent} per, dirty_count: {chunk_cache.dirtyCount}, mem_dirty: {chunk_cache.memDirty}")
chunk_arr = None
dset_id = getDatasetId(chunk_id)
dims = getChunkLayout(dset_json)
type_json = dset_json["type"]
dt = createDataType(type_json)
bucket = None
s3key = None
if s3path:
if not s3path.startswith("s3://"):
# TBD - verify these at dataset creation time?
log.error(f"unexpected s3path for getChunk: {s3path}")
raise HTTPInternalServerError()
path = s3path[5:]
index = path.find('/') # split bucket and key
if index < 1:
log.error(f"s3path is invalid: {s3path}")
raise HTTPInternalServerError()
bucket = path[:index]
log.debug(f"using bucket: {bucket}")
s3key = path[(index+1):]
log.debug(f"Using bucket: {bucket} and s3key: {s3key}")
else:
s3key = getS3Key(chunk_id)
log.debug("getChunk s3key: {}".format(s3key))
if chunk_id in chunk_cache:
chunk_arr = chunk_cache[chunk_id]
else:
if s3path and s3size == 0:
obj_exists = False
else:
obj_exists = await isS3Obj(app, s3key, bucket=bucket)
# TBD - potential race condition?
if obj_exists:
pending_s3_read = app["pending_s3_read"]
if chunk_id in pending_s3_read:
# already a read in progress, wait for it to complete
read_start_time = pending_s3_read[chunk_id]
log.info(f"s3 read request for {chunk_id} was requested at: {read_start_time}")
while time.time() - read_start_time < 2.0:
log.debug("waiting for pending s3 read, sleeping")
await asyncio.sleep(1) # sleep for sub-second?
if chunk_id in chunk_cache:
log.info(f"Chunk {chunk_id} has arrived!")
chunk_arr = chunk_cache[chunk_id]
break
if chunk_arr is None:
log.warn(f"s3 read for chunk {chunk_id} timed-out, initiaiting a new read")
if chunk_arr is None:
if chunk_id not in pending_s3_read:
pending_s3_read[chunk_id] = time.time()
log.debug("Reading chunk {} from S3".format(s3key))
deflate_level = getDeflate(app, dset_id, dset_json)
chunk_bytes = await getS3Bytes(app, s3key, deflate_level=deflate_level, s3offset=s3offset, s3size=s3size, bucket=bucket)
if chunk_id in pending_s3_read:
# read complete - remove from pending map
elapsed_time = time.time() - pending_s3_read[chunk_id]
log.info(f"s3 read for {s3key} took {elapsed_time}")
del pending_s3_read[chunk_id]
else:
log.warn(f"expected to find {chunk_id} in pending_s3_read map")
chunk_arr = np.fromstring(chunk_bytes, dtype=dt)
chunk_arr = chunk_arr.reshape(dims)
log.debug("chunk size: {}".format(chunk_arr.size))
elif chunk_init:
log.debug("Initializing chunk {chunk_id}")
fill_value = getFillValue(dset_json)
if fill_value:
# need to convert list to tuples for numpy broadcast
if isinstance(fill_value, list):
fill_value = tuple(fill_value)
chunk_arr = np.empty(dims, dtype=dt, order='C')
chunk_arr[...] = fill_value
else:
chunk_arr = np.zeros(dims, dtype=dt, order='C')
else:
log.debug(f"Chunk {chunk_id} not found")
if chunk_arr is not None:
# check that there's room in the cache before adding it
if chunk_cache.memTarget - chunk_cache.memDirty < chunk_arr.size:
# no room in the cache, wait till space is freed by the s3sync task
wait_start = time.time()
while chunk_cache.memTarget - chunk_cache.memDirty < chunk_arr.size:
log.warn(f"getChunk, cache utilization: {chunk_cache.cacheUtilizationPercent}, sleeping till items are flushed")
if time.time() - wait_start > MAX_WAIT_TIME:
log.error(f"unable to save updated chunk {chunk_id} to cache returning 503 error")
raise HTTPServiceUnavailable()
await asyncio.sleep(1)
chunk_cache[chunk_id] = chunk_arr # store in cache
return chunk_arr
async def s3sync(app):
""" Periodic method that writes dirty objects in the metadata cache to S3"""
MAX_PENDING_WRITE_REQUESTS = 20
dirty_ids = app["dirty_ids"]
pending_s3_write = app["pending_s3_write"]
pending_s3_write_tasks = app["pending_s3_write_tasks"]
s3_sync_interval = config.get("s3_sync_interval")
dirty_count = len(dirty_ids)
if not dirty_count:
log.info("s3sync nothing to update")
return 0
log.info(
f"s3sync update - dirtyid count: {dirty_count}, active write tasks: {len(pending_s3_write_tasks)}/{MAX_PENDING_WRITE_REQUESTS}"
)
log.debug(f"s3sync dirty_ids: {dirty_ids}")
log.debug(f"sesync pending write s3keys: {list(pending_s3_write.keys())}")
log.debug(f"s3sync write tasks: {list(pending_s3_write_tasks.keys())}")
def callback(future):
try:
obj_id = future.result() # returns a objid
log.info(f"write_s3_obj callback result: {obj_id}")
except HTTPInternalServerError as hse:
log.error(f"write_s3_obj callback got 500: {hse}")
except Exception as e:
log.error(f"write_s3_obj callback unexpected exception: {e}")
update_count = 0
s3sync_start = time.time()
for obj_id in dirty_ids:
s3key = getS3Key(obj_id)
log.debug(f"s3sync dirty id: {obj_id}, s3key: {s3key}")
create_task = True
if s3key in pending_s3_write:
log.debug(
f"key {s3key} has been pending for {s3sync_start - pending_s3_write[s3key]}"
)
if s3sync_start - pending_s3_write[s3key] > s3_sync_interval * 2:
log.warn(
f"obj {obj_id} has been in pending_s3_write for {s3sync_start - pending_s3_write[s3key]} seconds, restarting"
)
del pending_s3_write[s3key]
if obj_id not in pending_s3_write_tasks:
log.error(f"Expected to find write task for {obj_id}")
else:
task = pending_s3_write_tasks[obj_id]
task.cancel()
del pending_s3_write_tasks[obj_id]
else:
log.debug(f"key {s3key} has a pending write task")
create_task = False
if obj_id not in pending_s3_write_tasks:
log.error(
f"expected to find {obj_id} in pending_s3_write_tasks")
if create_task and len(
pending_s3_write_tasks) < MAX_PENDING_WRITE_REQUESTS:
# create a task to write this object
log.debug(f"s3sync - ensure future for {obj_id}")
task = asyncio.ensure_future(write_s3_obj(app, obj_id))
task.add_done_callback(callback)
pending_s3_write_tasks[obj_id] = task
update_count += 1
# notify AN of key updates
an_url = getAsyncNodeUrl(app)
notify_objs = app["an_notify_objs"]
if len(notify_objs) > 0:
log.info(f"Notifying AN for {len(notify_objs)} S3 Updates")
body = {"objs": list(notify_objs)}
notify_objs.clear()
req = an_url + "/objects"
try:
log.info("ASync PUT notify: {} body: {}".format(req, body))
await http_put(app, req, data=body)
except HTTPInternalServerError as hpe:
msg = "got error notifying async node: {}".format(hpe)
log.error(msg)
# return number of objects written
return update_count