Merge pull request #3340
284fe64
db_lmdb: warn about slowness when running off a spinning disk (moneromooo-monero)
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commit
25e7a7d96f
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@ -1178,6 +1178,9 @@ void BlockchainLMDB::open(const std::string& filename, const int db_flags)
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throw DB_ERROR("Database could not be opened");
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}
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if (tools::is_hdd(filename.c_str()))
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MCLOG_RED(el::Level::Warning, "global", "The blockchain is on a rotating drive: this will be very slow, use a SSD if possible");
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m_folder = filename;
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#ifdef __OpenBSD__
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@ -34,6 +34,17 @@
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#include <gnu/libc-version.h>
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#endif
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#ifdef __GLIBC__
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <ustat.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <string.h>
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#include <ctype.h>
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#include <string>
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#endif
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#include "unbound.h"
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#include "include_base_utils.h"
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@ -632,6 +643,65 @@ std::string get_nix_version_display_string()
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#endif
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}
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bool is_hdd(const char *path)
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{
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#ifdef __GLIBC__
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std::string device = "";
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struct stat st, dst;
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if (stat(path, &st) < 0)
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return 0;
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DIR *dir = opendir("/dev/block");
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if (!dir)
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return 0;
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struct dirent *de;
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while ((de = readdir(dir)))
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{
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if (strcmp(de->d_name, ".") && strcmp(de->d_name, ".."))
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{
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std::string dev_path = std::string("/dev/block/") + de->d_name;
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char resolved[PATH_MAX];
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if (realpath(dev_path.c_str(), resolved) && !strncmp(resolved, "/dev/", 5))
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{
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if (stat(resolved, &dst) == 0)
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{
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if (dst.st_rdev == st.st_dev)
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{
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// take out trailing digits (eg, sda1 -> sda)
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char *ptr = resolved;
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while (*ptr)
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++ptr;
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while (ptr > resolved && isdigit(*--ptr))
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*ptr = 0;
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device = resolved + 5;
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break;
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}
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}
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}
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}
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}
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closedir(dir);
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if (device.empty())
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return 0;
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std::string sys_path = "/sys/block/" + device + "/queue/rotational";
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FILE *f = fopen(sys_path.c_str(), "r");
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if (!f)
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return false;
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char s[8];
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char *ptr = fgets(s, sizeof(s), f);
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fclose(f);
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if (!ptr)
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return 0;
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s[sizeof(s) - 1] = 0;
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int n = atoi(s); // returns 0 on parse error
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return n == 1;
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#else
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return 0;
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#endif
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}
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namespace
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{
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boost::mutex max_concurrency_lock;
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@ -212,4 +212,6 @@ namespace tools
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bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash);
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bool sha256sum(const std::string &filename, crypto::hash &hash);
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bool is_hdd(const char *path);
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}
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