### Usage scanner

// Expression represents a logical disjunction of clauses
type Expression struct {
	And []*AndCondition `parser:"@@ ( \"OR\" @@ )*"`
}

// ListExpr represents a literal list with elements as expressions.
type ListExpr struct {
	Elements []*Expression `parser:"\"(\" @@ ( \",\" @@ )* \")\" | \"[\" @@ ( \",\" @@ )* \"]\""`
}

// AndCondition represents logical conjunction of clauses
type AndCondition struct {

			return Config{}, err
		}
	} else {
		cfg.RRS.Parity = defaultRRSParity
		if setDriveCount == 1 {
			cfg.RRS.Parity = 0
		}
	}

	// Validation is done after parsing both the storage classes. This is needed because we need one
	// storage class value to deduce the correct value of the other storage class.
	if err = validateParity(cfg.Standard.Parity, cfg.RRS.Parity, setDriveCount); err != nil {
		return Config{}, err

	} else {
		handler = c.handlers.subSingle[*subID]
	}
	if handler == nil {
		gridLogIf(ctx, c.queueMsg(m, muxConnectError{Error: "Invalid Handler for type"}))
		return
	}

	// TODO: This causes allocations, but escape analysis doesn't really show the cause.
	// If another faithful engineer wants to take a stab, feel free.
	go func(m message) {
		var start time.Time
		if m.DeadlineMS > 0 {

)

var (
	errInvalidASTNode    = errors.New("invalid AST Node")
	errExpectedBool      = errors.New("expected bool")
	errLikeNonStrArg     = errors.New("LIKE clause requires string arguments")
	errLikeInvalidEscape = errors.New("LIKE clause has invalid ESCAPE character")
	errNotImplemented    = errors.New("not implemented")
)

// AST Node Evaluation functions
//

	})
}

// Options lock options.
type Options struct {
	Timeout       time.Duration
	RetryInterval time.Duration
}

// GetLock tries to get a write lock on dm before the timeout elapses.
//
// If the lock is already in use, the calling go routine
// blocks until either the mutex becomes available and return success or
// more time has passed than the timeout value and return false.

functionality to complete writing data to the datastore. Object storage operations are atomic by nature and they do not require/implement rename API. The default S3A committer emulates renames through copy and delete APIs. This interaction pattern causes significant loss of performance because of the write amplification. _Netflix_, for example, developed two new staging committers - the Directory staging committer and the Partitioned staging committer - to take full advantage of native object storage...

}

func errUnsupportedStorageClass(err error) *s3Error {
	return &s3Error{
		code:       "UnsupportedStorageClass",
		message:    "Encountered an invalid storage class. Only STANDARD, STANDARD_IA, and ONEZONE_IA storage classes are supported.",
		statusCode: 400,
		cause:      err,
	}

			if testCase.inputMeta["etag"] != objInfo.ETag {
				t.Errorf("Test %d: %s: Calculated Md5 different from the actual one %s.", i+1, instanceType, objInfo.ETag)
			}
		}
	}

	// This causes quorum failure verify.
	os.RemoveAll(disks[len(disks)-1])

	// Validate the last test.
	testCase := struct {
		bucketName    string
		objName       string
		inputData     []byte

		case errFirstDiskWait:
			// Fresh setup, wait for other servers to come up.
			logger.Info("Waiting for all other servers to be online to format the drives (elapses %s)\n", getElapsedTime())
		case errErasureReadQuorum:
			// no quorum available continue to wait for minimum number of servers.
			logger.Info("Waiting for a minimum of %d drives to come online (elapsed %s)\n",