Synnefo » snf-ganeti

The output of the program is designed to interpreted as a shell

fragment (or parsed as a \fIkey=value\fR file). Options which extend

the output (e.g. -p, -v) will output the additional information on

stderr (such that the stdout is still parseable).

The following keys are available in the output of the script (all

prefixed with \fIHTS_\fR):

.TP

.I SPEC_MEM, SPEC_DSK, SPEC_CPU, SPEC_RQN

These represent the specifications of the instance model used for

allocation (the memory, disk, cpu, requested nodes).

.TP

.I CLUSTER_MEM, CLUSTER_DSK, CLUSTER_CPU, CLUSTER_NODES

These represent the total memory, disk, CPU count and total nodes in

the cluster.

.TP

.I INI_SCORE, FIN_SCORE

These are the initial (current) and final cluster score (see the hbal

man page for details about the scoring algorithm).

.TP

.I INI_INST_CNT, FIN_INST_CNT

The initial and final instance count.

.TP

.I INI_MEM_FREE, FIN_MEM_FREE

The initial and final total free memory in the cluster (but this

doesn't necessarily mean available for use).

.TP

.I INI_MEM_AVAIL, FIN_MEM_AVAIL

The initial and final total available memory for allocation in the

cluster. If allocating redundant instances, new instances could

increase the reserved memory so it doesn't necessarily mean the

entirety of this memory can be used for new instance allocations.

.TP

.I INI_MEM_RESVD, FIN_MEM_RESVD

The initial and final reserved memory (for redundancy/N+1 purposes).

.TP

.I INI_MEM_INST, FIN_MEM_INST

The initial and final memory used for instances (actual runtime used

RAM).

.TP

.I INI_MEM_OVERHEAD, FIN_MEM_OVERHEAD

The initial and final memory overhead - memory used for the node

itself and unacounted memory (e.g. due to hypervisor overhead).

.TP

.I INI_MEM_EFF, HTS_INI_MEM_EFF

The initial and final memory efficiency, represented as instance

memory divided by total memory.

.TP

.I INI_DSK_FREE, INI_DSK_AVAIL, INI_DSK_RESVD, INI_DSK_INST, INI_DSK_EFF

Initial disk stats, similar to the memory ones.

.TP

.I FIN_DSK_FREE, FIN_DSK_AVAIL, FIN_DSK_RESVD, FIN_DSK_INST, FIN_DSK_EFF

Final disk stats, similar to the memory ones.

.TP

.I INI_CPU_INST, FIN_CPU_INST

Initial and final number of virtual CPUs used by instances.

.TP

.I INI_CPU_EFF, FIN_CPU_EFF

The initial and final CPU efficiency, represented as the count of

virtual instance CPUs divided by the total physical CPU count.

.TP

.I INI_MNODE_MEM_AVAIL, FIN_MNODE_MEM_AVAIL

The initial and final maximum per-node available memory. This is not

very useful as a metric but can give an impression of the status of

the nodes; as an example, this value restricts the maximum instance

size that can be still created on the cluster.

.TP

.I INI_MNODE_DSK_AVAIL, FIN_MNODE_DSK_AVAIL

Like the above but for disk.

.TP

.I ALLOC_USAGE

The current usage represented as initial number of instances divided

per final number of instances.

.TP

.I ALLOC_COUNT

The number of instances allocated (delta between FIN_INST_CNT and

INI_INST_CNT).

.TP

.I ALLOC_FAIL*_CNT

For the last attemp at allocations (which would have increased

FIN_INST_CNT with one, if it had succeeded), this is the count of the

failure reasons per failure type; currently defined are FAILMEM,

FAILDISK and FAILCPU which represent errors due to not enough memory,

disk and CPUs, and FAILN1 which represents a non N+1 compliant cluster

on which we can't allocate instances at all.

.TP

.I ALLOC_FAIL_REASON

The reason for most of the failures, being one of the above FAIL*

strings.

.TP

.I OK

A marker representing the successful end of the computation, and

having value "1". If this key is not present in the output it means

that the computation failed and any values present should not be

relied upon.

shown in the standard error.