Commit 5c0c6f9d authored by Igor Merkulow's avatar Igor Merkulow
Browse files

added validator schema and fixed few bugs in the spec

parent 9cbf6ea1
......@@ -5,14 +5,14 @@ STR_MIN = 3
STR_MAX = 45
# only lower-case and numbers, no whitespace
LOW_NO_WS = r'[a-z0-9_]+'
BOTH_NO_WS = r'[a-zA-Z0-9_]+' # both cases, numbers, no whitespace
UPLO_NO_WS = r'[a-zA-Z0-9_]+' # both cases, numbers, no whitespace
# both cases, numbers, space allowed
BOTH_WITH_WS = r'[a-zA-Z0-9_ \(\)@\.,\-]+'
STR_DEFAULT = {'type': 'string', 'regex': BOTH_NO_WS,
UPLO_WITH_WS = r'[a-zA-Z0-9_ \(\)@\.,\-]+'
STR_DEFAULT = {'type': 'string', 'regex': UPLO_NO_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX, 'required': True}
MIO = 1000 * 1000 # one million
TIME_MIN = 1000 * MIO # was on 9 Sep 2001, so we should get larger values
DUR_MAX = 365 * 24 * 60 * 60 # 1 year
INT_TS = 1000 * MIO # was on 9 Sep 2001, so we should get larger values
DUR_MAX = 31556952 # exactly one year, maybe use 365 * 24 * 60 * 60
CU_MAX = 100 * MIO # 100 Mio should be future-proof
NODE_MAX = 10 * MIO # 10 Mio nodes - again, future-proof
MB = 1024 * 1024 # 1 megabyte
......@@ -32,11 +32,11 @@ SCHEMA = {
'user_name': STR_DEFAULT,
'used_queue': STR_DEFAULT,
'submit_time': {'type': 'integer', 'required': True,
'min': TIME_MIN},
'min': INT_TS},
'start_time': {'type': 'integer', 'required': True,
'min': TIME_MIN},
'min': INT_TS},
'end_time': {'type': 'integer', 'required': True,
'min': TIME_MIN},
'min': INT_TS},
'requested_time': {'type': 'integer', 'required': True,
'min': 1, 'max': DUR_MAX},
'requested_cu': {'type': 'integer', 'required': True,
......@@ -56,7 +56,7 @@ SCHEMA = {
'schema': {
'node_name': STR_DEFAULT,
'cpu_model': {'type': 'string', 'required': True,
'regex': BOTH_WITH_WS,
'regex': UPLO_WITH_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX},
'available_main_mem': {'type': 'integer', 'required': True,
'min': MEM_MIN_TOTAL,
......@@ -86,6 +86,189 @@ SCHEMA = {
}
}
TS_ENTRY = {
'static': {
'type': 'dict',
'keyschema': {'type': 'string', 'required': True,
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': {
'pfit_timestamp': {'type': 'integer', 'min': 1, 'required': True},
'pfit_cpu_time_user': {'type': 'integer', 'min': 0,
'required': True},
'pfit_cpu_time_system': {'type': 'integer', 'min': 0,
'required': True},
'pfit_cpu_time_idle': {'type': 'integer', 'min': 0,
'required': True},
'pfit_cpu_time_iowait': {'type': 'integer', 'min': 0,
'required': False},
'pfit_mem_rss': {'type': 'integer', 'required': True,
'min': MEM_MIN_PROC, 'max': MEM_MAX_PROC},
'pfit_used_swap_size': {'type': 'integer', 'min': 0,
'required': True},
'pfit_fs_read_bytes': {'type': 'integer', 'min': 0,
'required': False},
'pfit_fs_write_bytes': {'type': 'integer', 'min': 0,
'required': False},
'pfit_fs_read_count': {'type': 'integer', 'min': 0,
'required': False},
'pfit_fs_write_count': {'type': 'integer', 'min': 0,
'required': False},
'pfit_num_threads': {'type': 'integer', 'min': 0,
'required': False},
'pfit_num_processes': {'type': 'integer', 'min': 0,
'required': True},
'pfit_load1': {'type': 'float', 'min': 0, 'required': False},
'pfit_total_context_switches': {'type': 'integer', 'min': 0,
'required': False},
}
}
}
NODE = {
'static': {
'type': 'dict',
'keyschema': {'type': 'string', 'required': True,
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': {
'pfit_node_name': {'type': 'string', 'regex': UPLO_NO_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX,
'required': True},
'pfit_cpu_model': {'type': 'string', 'regex': UPLO_WITH_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX,
'required': True},
'pfit_available_main_mem': {'type': 'integer',
'min': MEM_MIN_PROC,
'max': MEM_MAX_PROC,
'required': True},
'pfit_mem_latency': {'type': 'float', 'min': 0, 'required': False},
'pfit_mem_bw': {'type': 'float', 'min': 0, 'required': False},
'pfit_sockets_per_node': {'type': 'integer', 'required': True,
'min': 1, 'max': 16},
'pfit_cores_per_socket': {'type': 'integer', 'required': True,
'min': 1, 'max': 1024},
'pfit_phys_threads_per_core': {'type': 'integer', 'required': True,
'min': 1, 'max': 1024},
'pfit_virt_threads_per_core': {'type': 'integer', 'required': True,
'min': 0, 'max': 1024},
'pfit_cache_l1i_size': {'type': 'integer', 'required': True,
'min': 1},
'pfit_cache_l1d_size': {'type': 'integer', 'required': True,
'min': 1},
'pfit_cache_l2_size': {'type': 'integer', 'required': True,
'min': 1},
'pfit_cache_l3_size': {'type': 'integer', 'required': True,
'min': 0},
'pfit_assigned_cpus': {'type': 'integer', 'min': 1,
'required': True},
'pfit_max_alloc_mem': {'type': 'integer', 'min': MEM_MIN_PROC,
'max': MEM_MAX_PROC, 'required': False},
'pfit_requested_mem': {'type': 'integer', 'min': 0,
'required': True},
}
},
'dynamic': {
'type': 'list',
'empty': False,
'required': True,
'schema': {
'type': 'dict',
'keyschema': {'type': 'string',
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': TS_ENTRY
}
},
'node_aggregates': {
'type': 'dict',
'keyschema': {'type': 'string', 'required': True,
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': {
'pfit_num_processes_node_min': {'type': 'integer', 'min': 1,
'required': True},
'pfit_num_processes_node_max': {'type': 'integer', 'min': 1,
'required': True},
'pfit_num_processes_node_avg': {'type': 'integer', 'min': 1,
'required': True},
'pfit_num_processes_node_median': {'type': 'integer', 'min': 1,
'required': True},
'pfit_num_threads_node_min': {'type': 'integer', 'min': 1,
'required': False},
'pfit_num_threads_node_max': {'type': 'integer', 'min': 1,
'required': False},
'pfit_num_threads_node_avg': {'type': 'integer', 'min': 1,
'required': False},
'pfit_num_threads_node_median': {'type': 'integer', 'min': 1,
'required': False},
'pfit_mem_rss_node_avg': {'type': 'integer', 'min': MEM_MIN_PROC,
'max': MEM_MAX_PROC, 'required': True},
'pfit_mem_rss_node_max': {'type': 'integer', 'min': MEM_MIN_PROC,
'max': MEM_MAX_PROC, 'required': True},
'pfit_used_swap_node_max': {'type': 'integer', 'min': 0,
'required': True},
}
}
}
SCHEMA2 = {
'general': {
'type': 'dict',
'keyschema': {'type': 'string', 'required': True,
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': {
'pfit_job_id': {'type': 'string', 'regex': UPLO_NO_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX,
'required': True},
'pfit_user_name': {'type': 'string', 'regex': UPLO_NO_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX,
'required': True},
'pfit_project_account': {'type': 'string', 'regex': UPLO_NO_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX,
'required': False},
'pfit_used_queue': {'type': 'string', 'regex': UPLO_NO_WS,
'minlength': STR_MIN, 'maxlength': STR_MAX,
'required': True},
'pfit_submit_time': {'type': 'integer', 'required': True,
'min': INT_TS},
'pfit_start_time': {'type': 'integer', 'required': True,
'min': INT_TS},
'pfit_end_time': {'type': 'integer', 'required': True,
'min': INT_TS},
'pfit_requested_time': {'type': 'integer', 'required': True,
'min': 1, 'max': DUR_MAX},
'pfit_requested_cores': {'type': 'integer', 'required': True,
'min': 1},
'pfit_num_used_nodes': {'type': 'integer', 'required': True,
'min': 1},
'pfit_sampling_interval': {'type': 'string',
'regex': r'[0-9]+[h|m|s]',
'minlength': 2, 'maxlength': 10,
'required': True},
'pfit_return_value': {'type': 'integer', 'min': 0, 'max': 1,
'required': False},
}
},
'nodes': {
'type': 'list',
'empty': False,
'required': True,
'schema': {
'type': 'dict',
'keyschema': {'type': 'string',
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': NODE,
}
},
'job_aggregates': {
'type': 'dict',
'keyschema': {'type': 'string', 'required': True,
'regex': LOW_NO_WS, 'minlength': STR_MIN},
'schema': {
'pfit_used_swap_job': {'type': 'integer', 'min': 0, 'max': 1,
'required': True}
}
}
}
# Report formatting
COLS = ['load_1', 'load_5', 'load_15', 'last_pid',
'cpu_mhz', 'memfree', 'buffers', 'cached', 'inactive(anon)',
......@@ -166,4 +349,4 @@ job_info = {
}
# Batch system
BATCH_SYSTEM = "SLURM" # LSF, SLURM
BATCH_SYSTEM = "SLURM" # LSF, SLURM
......@@ -46,6 +46,8 @@ TODO: do we already have metrics, supported by all tools/plugins, but not includ
- SEC: value is in seconds
- MEM-PR: Plausibility check for memory amounts - default is [10MB, 10TB]
Question mark means that the data is not yet there, minus sign means "not applicable".
## Metrics representing global job information
......@@ -61,13 +63,13 @@ Most of this information is provided by the job management system and can probab
|`pfit_submit_time`|integer|INT-TS|y|Job submitted|
|`pfit_start_time`|integer|INT-TS|y|Job started execution|
|`pfit_end_time`|integer|INT-TS|y|Job finished/terminated|
|`pfit_requested_time`|integer|SEC, Range [1, 31,556,952]|y|Total requested job walltime - should roughly be equal to (start_time - end_time). Upper limit is set to one year.|
|`pfit_requested_time`|integer|SEC, Range [1, 31,556,952]|y|Total requested job walltime - should roughly be equal to (start_time - end_time). Upper limit is one year.|
|`pfit_requested_cores`|integer|INT-POS|y|Total number of cores (sum over all nodes) requested|
|`pfit_num_used_nodes`|integer|INT-POS|y|Number of nodes the job ran on - it also has to be equal to the number of node-related data blocks in the set|
|`pfit_sampling_interval`|string|"[0-9]+ [h\|m\|s]"|y|How often metrics are generated. If there are multiple time intervals for different metrics, the shortest should be stated here.|
|`pfit_return_value`|integer|either 0 or 1|n|Should signal if the job has finished correctly. Is not necessarily the result delivered by the job management system, since programs can have also negative exit codes.|
`pfit_sampling_interval` is a value that we set in the configuration, so it should be identical for all nodes, but it can also be aggregated if necessary. TODO: define how exactly the interval is specified (e.g. if "1m30s" should be allowed or only "90s") and adapt the RegEx. Maybe integer value in seconds would be better.
`pfit_sampling_interval` is a value that we set in the configuration, so it should be identical for all nodes, but it can also be aggregated if necessary. TODO: define how exactly the interval is specified (e.g. if "1m30s" should be allowed or only "90s") and adapt the RegEx. Maybe integer value in seconds would be better. Currently, only lengths between 2 and 10 are allowed by the validator.
## Metrics per node
......@@ -77,9 +79,9 @@ Most of this information is provided by the job management system and can probab
| --- | --- | --- | --- | --- |
|`pfit_node_name`|string|STR|y|Identifier of a node, has to be unique for the job|
|`pfit_cpu_model`|string|STR-EXT|y|CPU vendor and model name|
|`pfit_available_main_mem`|integer|BYTE, Plausibility range [10MB, 10TB]|y|Node's total RAM amount|
|`pfit_mem_latency`|float|Nanoseconds|n|RAM latency, default value|
|`pfit_mem_bw`|float|MB per second|n|RAM bandwidth, default value|
|`pfit_available_main_mem`|integer|BYTE, MEM-PR|y|Node's total RAM amount|
|`pfit_mem_latency`|float|Nanoseconds, FLOAT-POS0|n|RAM latency, default value|
|`pfit_mem_bw`|float|MB per second, FLOAT-POS0|n|RAM bandwidth, default value|
|`pfit_sockets_per_node`|integer|Range [1, 16]|y|Number of CPU sockets for this node|
|`pfit_cores_per_socket`|integer|Range [1, 1024]|y|Number of actual CPU cores for every socket (assumes node-wide identical number for every socket)|
|`pfit_phys_threads_per_core`|integer|Range [1, 1024]|y|How many physical/HW threads can be executed on a CPU core|
......@@ -89,47 +91,48 @@ Most of this information is provided by the job management system and can probab
|`pfit_cache_l2_size`|integer|BYTE, INT-POS|y|L2 Cache size per core|
|`pfit_cache_l3_size`|integer|BYTE, INT-POS0|y|L3 Cache size per core, zero if not available|
|`pfit_assigned_cpus`|integer|INT-POS|y|CPU is a physical or logical thread in Intel's parlance. We need the number of CPUs, assigned to this job on this node. Has to be less or equal to the total number of CPUs available on the node.|
|`pfit_used_mem`|integer|BYTE, Plausibility range [10MB, 10TB]|y|Maximum memory size allocated by job per node. It includes all memory that the process can access, including memory that is swapped out, memory that is allocated, but not used, and memory that is from shared libraries.|
|`pfit_max_alloc_mem`|integer|BYTE, MEM-PR|y|Maximum memory size allocated by job per node. It includes all memory that the process can access, including memory that is swapped out, memory that is allocated, but not used, and memory that is from shared libraries.|
|`pfit_requested_mem`|integer|BYTE, INT-POS0|y|Amount of RAM on this node, requested by the job|
- `pfit_node_name` - can be reported by the job management or extracted with `uname -n`. It's uniqueness in the context of the job has to be guaranteed. Used to distinguish the node-related data sets.
- `pfit_node_name` - can be reported by the job management or extracted with `uname -n`. Its uniqueness in the context of the job has to be guaranteed. Used to distinguish the node-related data sets.
- `pfit_cpu_model` - CPU vendor string, is collected just for the statistical purposes and is currently not processed further.
- `pfit_available_main_mem` - a total amount of physically available memory, e.g. from `free` or `/proc/meminfo` (but converted to bytes). But if there are limits imposed on the processes' memory usage, this has to be the limit (e.g. from `ulimit -a`). Collected to analyse the memory usage.
- `pfit_mem_latency` and `pfit_mem_bw` - The values here are the best possible / upper limits, ideally measured on an empty machine (e.g. using `lmbench3` or other microbenchmarks) or even theoretical values derived from installed hardware. They can be used to estimate the efficiency of the memory usage.
- `pfit_sockets_per_node`, `pfit_cores_per_socket`, `pfit_phys_threads_per_core`, and `pfit_virt_threads_per_core` describe the CPU configuration - they can be basically generated with `lscpu | grep -E '^Thread|^Core|^Socket|^CPU\('`, but the threads per core need to be split into physical and virtual. E.g. if on an Intel CPU, the "threads per core" value is 2, then 1 physical and 1 virtual thread is configured (that also means Hyperthreading is active). If the value is just 1, then there is 1 physical and 0 virtual thread and HT is disabled.
- `pfit_cache_l1i_size`, `pfit_cache_l1d_size`, `pfit_cache_l2_size`, and `pfit_cache_l3_size` values are available through multiple linux tools, e.g. `getconf -a | grep -i cache`. Additional cache-related parameters (like cache line size and associativity) are not used at the moment. These values can be used later to identify sub-optimal memory access patterns. Additionally, `cache misses` and `tlb misses` will probably be necessary. Systems with L4 and L5 cache are considered too exotic at the moment.
- `pfit_assigned_cpus` - we need the maximum number of CPUs assigned to the job. It's used to calculate job-specific CPU usage efficiency. TODO: do we need number of processes per node? is it the same value for the job management? which value does the job management report?
- `pfit_used_mem` - what we need is the maximum amount of memory requested by a process from the OS (including libraries, swap, and whatsoever), so maybe this has to be moved to the "aggregates" section. In combination with requested memory and RSS values can help to identify a memory-bound job and also possible memory-related problems.
- `pfit_max_alloc_mem` - what we need is the maximum amount of memory requested by a process from the OS (including libraries, swap, and whatsoever), so maybe this has to be moved to the "aggregates" section. In combination with requested memory and RSS values can help to identify a memory-bound job and also possible memory-related problems.
- `pfit_requested_mem` - this is the amount of memory (per node) requested by user from the job management system. TODO: is this value delivered by all job management systems?
### Dynamic data - time samples per node
|Report metric|Data type|Constraint|Required|Information|
| --- | --- | --- | --- | --- |
|`pfit_timestamp`|integer|Nanoseconds, INT-POS0|y|Time stamp identifying the metrics|
|`pfit_cpu_time_user`|integer|SEC, INT-POS0|y|The part of the total walltime (over all cores) spent in the user code|
|`pfit_cpu_time_system`|integer|SEC, INT-POS0|y| --''-- system calls or kernel processes|
|`pfit_cpu_time_idle`|integer|SEC, INT-POS0|y| --''-- in the idle task (not doing anything)|
|`pfit_cpu_time_iowait`|integer|SEC, INT-POS0|n| --''-- waiting for IO. (s. below)|
|`pfit_mem_rss`|integer|BYTE, Plausibility range [10MB, 10TB]|y|RSS memory used by job per node|
|`pfit_used_swap`|integer|BYTE, INT-POS0|y|Used swap size|
|`pfit_mem_rss`|integer|BYTE, MEM-PR|y|RSS memory used by job per node|
|`pfit_used_swap_size`|integer|BYTE, INT-POS0|y|Used swap size|
|`pfit_fs_read_bytes`|integer|BYTE, INT-POS0|n|Total amount of data read from all disk filesystems on this node|
|`pfit_fs_write_bytes`|integer|BYTE, INT-POS0|n| --''-- written to all disk filesystems on this node|
|`pfit_fs_read_count`|integer|INT-POS0|n|Number of disk accesses for reading at this node|
|`pfit_fs_write_count`|integer|INT-POS0|n| --''-- for writing at this node|
|`pfit_num_threads`|integer|INT-POS|n|TODO: Not sure what this means - threads total on the node? User threads? Relevant process' threads?|
|`pfit_num_processes`|integer|INT-POS0|y|Number of processes on the node. The value of zero indicates a possible problem.|
|`pfit_total_context_switches`|integer|INT-POS0|n|Total amount of voluntary + involuntary switches combined. TODO: this is a highly OS-dependent value and there is no baseline or threshold to derive anything from it - why is it interesting?|
|`pfit_load1`|float|FLOAT-POS0|n|Weighted average number of processes waiting for execution on all the cores in the last 1 minute, can probably be derived from num_processes. On some systems, processes waiting for IO are counted, on other - not. Additionally, some systems count threads as processes (and other do not). Aggregating this value is not easy.|
|`pfit_total_context_switches`|integer|INT-POS0|n|Total amount of voluntary + involuntary switches combined. TODO: this is a highly OS-dependent value and there is no baseline or threshold to derive anything from it - why is it interesting?|
|`pfit_frequency_per_cpuX`|integer|Value in Hertz, INT-POS0|n|current CPU frequency for every CPU available, X has to be replaced with the CPU number|
- `pfit_cpu_time_user`, `pfit_cpu_time_system`, and `pfit_cpu_time_idle` are the values that can be obtained by timing the running program, in the format similar to the `time` utility. In combination with number of requested cores, they can help find stall times, thus maybe indicating some efficiency problems.
- `pfit_cpu_time_iowait` is a more complex value - it is a part of the idle value, so it's usually only measured/displayed on Linux if there is significant idle time. The reason for that is that idle is a CPU state, but iowait - a process state, thus if the CPU is working (e.g. executing a different process), there is no CPU idle time, so the iowait of a stalled process is ignored.
- `pfit_mem_rss` is a part of the process data (incl. process executable itself, libraries, memory allocations etc.) that are currently active in RAM. The data that is swapped out or unused is not included. This value can halp tracking the real-time memory usage and may help identify memory-related problems in combination with `pfit_used_mem` value.
- `pfit_mem_rss` is a part of the process data (incl. process executable itself, libraries, memory allocations etc.) that are currently active in RAM. The data that is swapped out or unused is not included. This value can help tracking the real-time memory usage and may help identify memory-related problems in combination with `pfit_used_mem` value.
- `pfit_used_swap` - size of used swap in bytes. Generally speaking, swap usage is sub-optimal, usually leading to significant performance decrease and can also indicate memory-related problems.
- `pfit_fs_read_bytes`, `pfit_fs_write_bytes`, `pfit_fs_read_count`, and `pfit_fs_write_count` are used to track disk accesses. Correlation between disk access and cpu load can help find out if the disk access is synchronous, which in turn can be an indicator of inefficient behavior.
- `pfit_num_processes` and `pfit_load1` basically show the same information in a different way (so maybe we should only keep one of them). Load1 value adds its own magic, being a weighted moving average value, thus making it much more complex to interpret. The process count seems to me to be the more interesting number, especially if broken down to "running", "waiting", "sleeping" etc. (can be achieved with `ps aux` or the like - the processes with the status "D", meaning "uninterruptible sleep", which is most often equivalent to "waiting for IO" can be used in combination with other IO-related metrics to get a better picture). This values can help understanding the job behavior and find possible bottlenecks.
- `pfit_num_threads` - if the total number is needed, it can be derived from the `ps -A` vs. `ps -AL` output. But need to discuss if this value is meaningful at all.
- `pfit_frequency_per_cpuX` - since this value is changing depending on the load, the thermal situation, and other parameters, it can be an indicator of some general problems of the node (e.g. combined with maximal possible frequency or with the current load value). Can be obtained with `cat /proc/cpuinfo | grep -i "cpu mhz"` or by using `i7z` (both results need to be converted to Hz).
- `pfit_frequency_per_cpuX` - since this value is changing depending on the load, the thermal situation, and other parameters, it can be an indicator of some general problems of the node (e.g. combined with maximal possible frequency or with the current load value). Can be obtained with `cat /proc/cpuinfo | grep -i "cpu mhz"` or by using `i7z` (both results need to be converted to Hz). This value is currently not validated due to the unclear number of CPUs. Converting this value to a nested structure seems not feasible yet.
### Aggregates per node
......@@ -141,10 +144,12 @@ IMPORTANT: Average values are often floats. Since the floating point value of e.
| --- | --- | --- | --- | --- | --- |
|`pfit_num_processes_node`|integer|INT-POS|min, max, avg, median|y|Number of processes on this node|
|`pfit_num_threads_node`|integer|INT-POS|min, max, avg, median|n|TODO: (the basic value needs to be defined properly first)|
|`pfit_mem_rss_node`|integer|BYTE, Plausibility range [10MB, 10TB]|max, avg|y|RSS memory statistics for this node|
|`pfit_mem_rss_node`|integer|BYTE, MEM-PR|max, avg|y|RSS memory statistics for this node|
|`pfit_used_swap_node`|integer|BYTE, INT-POS0|max|y|Max used swap on this node|
|`pfit_frequency_per_cpuX_node`|integer|Value in Hertz, INT-POS0|min, max, avg, median|n|Frequency aggregated per CPU (replace X with the CPU number)|
`pfit_frequency_per_cpuX_node` is currently not validated because the number of CPUs is not fixed and adding another nesting level just for one value is probably an overkill.
### Aggregates per job
|Report metric|Data type|Constraint|Aggregation|Required|Information|
......
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